diff --git a/browser/date/DateFormatter.ts b/browser/date/DateFormatter.ts
index 30cb217..e81cba7 100644
--- a/browser/date/DateFormatter.ts
+++ b/browser/date/DateFormatter.ts
@@ -1,9 +1,11 @@
 import { TextTool } from "../text/TextTool";
+import { DateHelper } from "./DateHelper";
 
 export class DateFormatter
 {
-  static YMD_HMS( date:Date ):string
+  static YMD_HMS( date:Date = undefined ):string
   {
+    date = date || DateHelper.now();
     let ye  = ( date.getFullYear() + "" ).substring( 2 );
     let mo  = TextTool.prependZeros( ( date.getMonth() + 1 ) );
     let da  = TextTool.prependZeros( date.getDate() );
@@ -15,6 +17,17 @@ export class DateFormatter
     return `${ye}-${mo}-${da} ${h}-${m}-${s}`;
   }
 
+  static HMS( date:Date = undefined ):string
+  {
+    date = date || DateHelper.now();
+
+    let h = TextTool.prependZeros( date.getHours() );
+    let m = TextTool.prependZeros( date.getMinutes() );
+    let s = TextTool.prependZeros( date.getSeconds() );
+
+    return `${h}:${m}:${s}`;
+  }
+
   static forUsers( date:Date ):string
   {
     let ye  = ( date.getFullYear() + "" );
diff --git a/browser/date/DateHelper.ts b/browser/date/DateHelper.ts
index 266e433..bd5ba2d 100644
--- a/browser/date/DateHelper.ts
+++ b/browser/date/DateHelper.ts
@@ -1,3 +1,6 @@
+import { DateExpressionLexer } from "../text/lexer/DateExpressionLexer";
+import { LexerQuery } from "../text/lexer/LexerQuery";
+
 export class DateHelper
 {
   static now()
@@ -31,4 +34,62 @@ export class DateHelper
 
     return date;
   }
+
+  static parseDateExpression( expression:string ):Date
+  {
+    let query = LexerQuery.from( expression, new DateExpressionLexer() );
+    
+    let now = query.find( le => le.isMatcher( DateExpressionLexer.Now ) );
+
+    if ( now )
+    {
+      return DateHelper.now();
+    }
+
+    let time = query.find( le => le.isMatcher( DateExpressionLexer.Time ) );    
+    let hourMinutesSeconds = ( time?.match || "9:00" ).split( ":" ).map( s => parseInt( s ) );
+
+    let hours = hourMinutesSeconds[ 0 ];
+    let minutes = hourMinutesSeconds[ 1 ];
+    let seconds = hourMinutesSeconds.length == 3 ? hourMinutesSeconds[ 2 ] : 0;
+    
+    let year  = DateHelper.now().getFullYear();
+    let month = DateHelper.now().getMonth();
+    let day   = DateHelper.now().getDate();
+
+    let date = query.find( le => /date/i.test( le.type ) );
+
+    if ( date )
+    {
+      let seperator = /slash/i.test( date.type ) ? "/" : /dot/i.test( date.type ) ? "." : "-"; 
+      
+      let values = date.match.replace( /(\/|\.|\-)$/, "" ).split( seperator ).map( s => parseInt( s ) );
+
+      if ( /reverse/i.test( date.type ) )
+      {
+        year = values[ 0 ];
+        month = values[ 1 ] - 1;
+        day = values[ 2 ];
+      }
+      else
+      {
+        day = values[ 0 ];
+        month = values[ 1 ] - 1;
+
+        if ( values.length == 3 )
+        {
+          year = values[ 2 ];
+
+          if ( year < 100 )
+          {
+            year += 2000;
+          }
+        }
+      }
+
+    }
+
+    return DateHelper.createYMD( year, month, day, hours, minutes, seconds );
+
+  } 
 }
\ No newline at end of file
diff --git a/browser/date/DateMath.ts b/browser/date/DateMath.ts
index cd52523..5efc43b 100644
--- a/browser/date/DateMath.ts
+++ b/browser/date/DateMath.ts
@@ -74,7 +74,8 @@ export class DateMath
 
   static isAfterNow( d:Date )
   {
-    return d.getTime() > DateHelper.now().getTime();
+    // return d.getTime() > DateHelper.now().getTime();
+    return DateMath.isAfter( d, DateHelper.now() );
   }
 
   static isInTheFuture( d:Date )
@@ -82,6 +83,11 @@ export class DateMath
     return DateMath.isAfterNow( d );
   }
 
+  static isAheadInTheFuture( d:Date, duration:number )
+  {    
+    return DateMath.isAfter( d, DateMath.addSeconds( DateHelper.now(), duration ) );
+  }
+
   static getDifferenceMs( a:Date, b:Date )
   {
     return a.getTime() - b.getTime();
@@ -115,16 +121,16 @@ export class DateMath
     return DateMath.addMinutes( new Date(), minutes );
   }
 
+  static fromNowAddSeconds( seconds:number )
+  {
+    return DateMath.addSeconds( new Date(), seconds );
+  }
+
   static addSeconds( a:Date, duration:number )
   {
     return this.addMilliseconds( a, duration * 1000 );
   }
 
-  static durationToHours( duration:number )
-  {
-
-  }
-
   static addMinutes( a:Date, durationMinutes:number )
   {
     return this.addSeconds( a, durationMinutes * 60 );
diff --git a/browser/date/Duration.ts b/browser/date/Duration.ts
index 2db4fdb..5307794 100644
--- a/browser/date/Duration.ts
+++ b/browser/date/Duration.ts
@@ -1,5 +1,15 @@
 export class Duration
 {
+  static toMilliSeconds( duration:number )
+  {
+    return duration * 1000;
+  }
+
+  static fromMilliSeconds( duration:number )
+  {
+    return duration / 1000;
+  }
+
   static toMinutes( duration:number )
   {
     return duration / 60;
diff --git a/browser/expressions/BooleanExpression.ts b/browser/expressions/BooleanExpression.ts
index f4bd4fd..d4802a0 100644
--- a/browser/expressions/BooleanExpression.ts
+++ b/browser/expressions/BooleanExpression.ts
@@ -112,3 +112,19 @@ export class OrExpression<T> extends ListInputExpression<T>
   }
 }
 
+export class LamdaExpression<T> extends BooleanExpression<T>
+{
+  _lamda:(t:T)=>boolean;
+
+  constructor( lamda:(t:T)=>boolean )
+  {
+    super();
+    this._lamda = lamda;
+  }
+
+  evaluate( t:T )
+  {
+    return this._lamda( t );
+  }
+}
+
diff --git a/browser/random/CryptoTool.ts b/browser/random/CryptoTool.ts
new file mode 100644
index 0000000..d7812f9
--- /dev/null
+++ b/browser/random/CryptoTool.ts
@@ -0,0 +1,35 @@
+import { JSRandomEngine } from "./JSRandomEngine";
+
+export class CryptoTool
+{
+  static randomUUID():string
+  {
+    if ( window.location.protocol !== "https" )
+    {
+      let random = JSRandomEngine.$;
+
+      let structure = [8,4,4,4,12];
+      
+      let id = "";
+      let first = true;
+
+      for ( let j = 0; j < structure.length; j++ )
+      {
+        if ( first ){ first = false; }
+        else{ id +="-"; }
+
+        let num = structure[ j ];
+        
+        for ( let i = 0; i < num; i++ )
+        {
+          id += random.fromString( "0123456789abcdef" );
+        }
+      }
+
+      return id;
+
+    }
+
+    return crypto.randomUUID();
+  }
+}
\ No newline at end of file
diff --git a/browser/text/lexer/DateExpressionLexer.ts b/browser/text/lexer/DateExpressionLexer.ts
new file mode 100644
index 0000000..a94fe6d
--- /dev/null
+++ b/browser/text/lexer/DateExpressionLexer.ts
@@ -0,0 +1,58 @@
+import { Lexer } from "./Lexer";
+import { LexerMatcher } from "./LexerMatcher";
+import { LexerMatcherLibrary } from "./LexerMatcherLibrary";
+
+export class DateExpressionLexer extends Lexer
+{
+  static readonly Now = new LexerMatcher( "Now", /now|jetzt/i );
+  static readonly Time = new LexerMatcher( "Time", /\d?\d\:\d\d(\:\d\d)?\s*(am|h|uhr)?/i );
+  
+  static readonly LongDateMinus = new LexerMatcher( "LongDateMinus", /\d?\d\-\d?\d\-\d\d\d\d/ );
+  static readonly LongDateDot = new LexerMatcher( "LongDateDot", /\d?\d\.\d?\d\.\d\d\d\d/ );
+  static readonly LongDateSlash = new LexerMatcher( "LongDateSlash", /\d?\d\/\d?\d\/\d\d\d\d/ );
+
+  static readonly ReverseLongDateMinus = new LexerMatcher( "ReverseLongDateMinus", /\d\d\d\d\-\d?\d\-\d?\d/ );
+  static readonly ReverseLongDateDot = new LexerMatcher( "ReverseLongDateDot", /\d\d\d\d\.\d?\d\.\d?\d/ );
+  static readonly ReverseLongDateSlash = new LexerMatcher( "ReverseLongDateSlash", /\d\d\d\d\/\d?\d\/\d?\d/ );
+
+  static readonly DateMinus = new LexerMatcher( "DateMinus", /\d?\d\-\d?\d\-\d\d/ );
+  static readonly DateDot = new LexerMatcher( "DateDot", /\d?\d\.\d?\d\.\d\d/ );
+  static readonly DateSlash = new LexerMatcher( "DateSlash", /\d?\d\/\d?\d\/\d\d/ );
+
+  static readonly ShortDateMinus = new LexerMatcher( "ShortDateMinus", /\d?\d\-\d?\d(\-)?/ );
+  static readonly ShortDateDot = new LexerMatcher( "ShortDateDot", /\d?\d\.\d?\d(\.)?/ );
+  static readonly ShortDateSlash = new LexerMatcher( "ShortDateSlash", /\d?\d\/\d?\d(\/)?/ );
+  
+  constructor()
+  {
+    super();
+
+    this.addAllMatchers( 
+
+      DateExpressionLexer.Now,
+      DateExpressionLexer.Time,
+
+      DateExpressionLexer.LongDateMinus,
+      DateExpressionLexer.LongDateDot,
+      DateExpressionLexer.LongDateSlash,
+
+      DateExpressionLexer.ReverseLongDateMinus,
+      DateExpressionLexer.ReverseLongDateDot,
+      DateExpressionLexer.ReverseLongDateSlash,
+
+      DateExpressionLexer.DateMinus,
+      DateExpressionLexer.DateDot,
+      DateExpressionLexer.DateSlash,
+
+      DateExpressionLexer.ShortDateMinus,
+      DateExpressionLexer.ShortDateDot,
+      DateExpressionLexer.ShortDateSlash,
+
+      LexerMatcherLibrary.WHITESPACE_MATCHER,
+      LexerMatcherLibrary.BREAK_MATCHER,
+      LexerMatcherLibrary.ANY_SYMBOL_MATCHER
+    );
+
+  }
+
+}
\ No newline at end of file
diff --git a/browser/text/lexer/Lexer.ts b/browser/text/lexer/Lexer.ts
index 87edcb3..cc14019 100644
--- a/browser/text/lexer/Lexer.ts
+++ b/browser/text/lexer/Lexer.ts
@@ -1,5 +1,6 @@
 import { LexerMatcher } from "./LexerMatcher";
 import { LexerEvent } from "./LexerEvent";
+import { LexerQuery } from "./LexerQuery";
 
 export class Lexer
 {
@@ -128,6 +129,14 @@ export class Lexer
     return events;
   }
 
+  createLexerQuery( source:string, offset:number = 0, mode:string = Lexer.defaultMode )
+  {
+    let query = new LexerQuery();
+    query.source = source;
+    query.tokens = this.lexTokens( source, offset, mode );
+    return query;
+  }
+
   lexToList( source:string, offset:number = 0, mode:string = Lexer.defaultMode )
   {
     var list:LexerEvent[] = [];
diff --git a/browser/text/lexer/LexerEvent.ts b/browser/text/lexer/LexerEvent.ts
index e312234..094a9c7 100644
--- a/browser/text/lexer/LexerEvent.ts
+++ b/browser/text/lexer/LexerEvent.ts
@@ -1,3 +1,5 @@
+import { LexerMatcher } from "./LexerMatcher";
+
 export class LexerEvent
 {
   static readonly LENGTH_ERROR_ID = -1;
@@ -41,7 +43,12 @@ export class LexerEvent
 
   isType( type:string )
   {
-    return this._type == type;
+    return this._type === type;
+  }
+
+  isMatcher( lexerMatcher:LexerMatcher )
+  {
+    return this._type === lexerMatcher.type;
   }
 
   get isError(){ return this._length === LexerEvent.LENGTH_ERROR_ID; }
diff --git a/browser/text/lexer/LexerQuery.ts b/browser/text/lexer/LexerQuery.ts
index d9c8592..56ad3b6 100644
--- a/browser/text/lexer/LexerQuery.ts
+++ b/browser/text/lexer/LexerQuery.ts
@@ -1,4 +1,6 @@
-import { BooleanExpression } from "../../expressions/BooleanExpression";
+import { BooleanExpression, LamdaExpression } from "../../expressions/BooleanExpression";
+import { ClassConstructor, isClassOf } from "../../tools/TypeUtilities";
+import { Lexer } from "./Lexer";
 import { LexerEvent } from "./LexerEvent";
 
 
@@ -9,6 +11,11 @@ export class LexerQuery
 
   _index:Map<LexerEvent,number> = new Map<LexerEvent,number>();
 
+  static from( source:string, lexer:Lexer )
+  {
+    return lexer.createLexerQuery( source );    
+  }
+
   createTokenIndex()
   {
     for ( let i = 0; i < this.tokens.length; i++ )
@@ -258,4 +265,20 @@ export class LexerQuery
 
     return nextIndex === -1 ? null : this.tokens[ nextIndex ];
   }
+
+  find( matcherOrPredicate:BooleanExpression<LexerEvent>|( (l:LexerEvent)=>boolean ) )
+  {
+    let matcher:BooleanExpression<LexerEvent> = null;
+
+    if ( isClassOf( matcher, BooleanExpression ) )
+    {
+      matcher = matcherOrPredicate as BooleanExpression<LexerEvent>;
+    }
+    else
+    {
+      matcher = new LamdaExpression<LexerEvent>( matcherOrPredicate as (l:LexerEvent)=>boolean );
+    }
+
+    return this.searchItem( 0, true, matcher );
+  }
 }
\ No newline at end of file
diff --git a/node/users/ErrorInfo.ts b/node/users/ErrorInfo.ts
new file mode 100644
index 0000000..7f09ba4
--- /dev/null
+++ b/node/users/ErrorInfo.ts
@@ -0,0 +1,4 @@
+export class ErrorInfo
+{
+  
+}
\ No newline at end of file
diff --git a/node/users/RequestHandler.ts b/node/users/RequestHandler.ts
index 5aa360d..5a80768 100644
--- a/node/users/RequestHandler.ts
+++ b/node/users/RequestHandler.ts
@@ -19,6 +19,9 @@ export abstract class RequestHandler
 {
 
   _ums:UserManagementServer;
+  
+  get ums(){ return this._ums; };
+
   _type:RequestType;
   _url:string;
 
diff --git a/node/users/UserDB.ts b/node/users/UserDB.ts
index bfd927f..893d369 100644
--- a/node/users/UserDB.ts
+++ b/node/users/UserDB.ts
@@ -32,6 +32,11 @@ export class UserDB
     return this.users.findIndex( u => u.email === email ) != -1;
   }
 
+  async hasUserWithID( id:string ):Promise<boolean>
+  {
+    return this.users.findIndex( u => u.id === id ) != -1;
+  }
+
   async signUp( email:string, password:string, userName:string = "User" ):Promise<UserData>
   {
     let userData = this._pendingUsers.find( u => u.email === email );
@@ -43,6 +48,8 @@ export class UserDB
       userData.email = email;
       userData.hashedPassword = await CryptIO.hash( password );
       userData.name = userName;
+      userData.role = Role.User;
+      userData.permissions = [];
       
       this._pendingUsers.push( userData );
       
@@ -208,8 +215,10 @@ export class UserDB
     return Promise.resolve( false );
   }
 
-  async _hasPermission( permissionID:string, permissions:Permission[] ):Promise<boolean>
+  protected async _hasPermission( permissionID:string, permissions:Permission[] ):Promise<boolean>
   {
+    permissions = permissions || [];
+
     for ( let p of permissions )
     {
       if ( Permission.isMatching( permissionID, p ) )
diff --git a/node/users/UserManagementServer.ts b/node/users/UserManagementServer.ts
index 1c40cf0..abc6944 100644
--- a/node/users/UserManagementServer.ts
+++ b/node/users/UserManagementServer.ts
@@ -1,7 +1,10 @@
-import Fastify, { FastifyHttpsOptions, FastifyInstance, FastifyListenOptions } from "fastify";
+import Fastify, { FastifyHttpsOptions, FastifyInstance, FastifyListenOptions, FastifyRequest } from "fastify";
 import fastifyMultipart from "@fastify/multipart";
 import cors from '@fastify/cors';
 
+import { EventSlot } from "../../browser/events/EventSlot";
+import { JSRandomEngine } from "../../browser/random/JSRandomEngine";
+
 import { UserDB } from "./UserDB";
 import { RequestHandler } from "./RequestHandler";
 import { EmailService as EmailService } from "./email/EmailService";
@@ -16,6 +19,15 @@ import { LocationService } from "./location/LocationService";
 import { RequestRequirement } from "./requirements/RequestRequirement";
 import { NotTooManyRequests } from "./requirements/security/NotTooManyRequests";
 import { FilesSync } from "../files/FilesSync";
+import { UserData } from "./UserData";
+import { Scheduler } from "./scheduler/Scheduler";
+import { DateHelper } from "../../browser/date/DateHelper";
+import { DateFormatter } from "../../browser/date/DateFormatter";
+import { Duration } from "../../browser/date/Duration";
+import { Task } from "./scheduler/Task";
+import { UserApp } from "./apps/UserApp";
+import { UserAppFactory } from "./apps/UserAppFactory";
+import { iTaskScheduler } from "./scheduler/iTaskScheduler";
 
 export class UserManagementServer
 {
@@ -43,6 +55,14 @@ export class UserManagementServer
   _globalRequirements:RequestRequirement[] = [];
   get globalRequirements(){ return this._globalRequirements; }
 
+  _apps:UserApp<any>[] = [];
+  get apps(){ return this._apps; }
+
+  _scheduler:Scheduler;
+  get scheduler(){ return this._scheduler; }
+
+  readonly onFileChanged = new EventSlot<string>();
+
   
   async initialize( settings:UserManagementServerSettings, mailService:EmailService, handlers:RequestHandler[], globalRequirements:RequestRequirement[] = null ):Promise<void>
   {
@@ -54,9 +74,12 @@ export class UserManagementServer
     await this._addGlobalRequirements( globalRequirements || UserManagementServer.DefaultGlobalRequirements() );
     await this._addServices( mailService );
     await this._addHandlers( handlers );
+    await this._startApps();
 
     await this._startServer();
 
+    this._update();
+
     return Promise.resolve();
 
   }
@@ -83,6 +106,16 @@ export class UserManagementServer
     return Promise.resolve();
   }
 
+  getUser( request:FastifyRequest ):Promise<UserData>
+  {
+    let requestBody = request.body;
+    let tokenData = requestBody as { token:string };
+    let tokenID = tokenData.token;
+
+    let session = this._sessions.get( tokenID );
+    return this.userDB.byID( session.userID );
+  }
+
   async sendEmail( to:string, title:string, message:string ):Promise<void>
   {
     return this.email.send( this._settings.emailFrom, to, title, message );
@@ -115,27 +148,52 @@ export class UserManagementServer
     
     this._app.register( fastifyMultipart );
 
-    for ( let corsURL of this._settings.corsURLs )
+    if ( this._settings.isDebugMode )
     {
-      RJLog.log( "Adding cors:", corsURL );
-      
+      RJLog.log( "Setting any cors:" );
+
       await this._app.register( cors,
-       {
-          origin: corsURL, 
-          credentials: true,
-          methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS']
-       }
-      );
+      {
+        origin: "*", 
+      });
+    }
+    else
+    {
+      for ( let corsURL of this._settings.corsURLs )
+      {
+        RJLog.log( "Adding cors:", corsURL );
+        
+        await this._app.register( cors,
+        {
+            origin: corsURL, 
+            credentials: true,
+            methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS']
+        }
+        );
+      }
     }
 
     return Promise.resolve();
+  } 
+
+  _updateDuration = 60;
+
+  protected _update()
+  {
+    let self = this;
+    
+    let waitTimeMS = Duration.toMilliSeconds( this._updateDuration );   
+    
+    setTimeout( () =>{ self._update() }, waitTimeMS );
   }
 
   async _addServices( mailService:EmailService ):Promise<void>
   {
     this._userDB = await UserDB.load( this, this._settings.userDBPath );
 
-    RJLog.log( "Loading roles:", this._settings.rolesPath );
+    this._scheduler = new Scheduler();
+
+    // RJLog.log( "Loading roles:", this._settings.rolesPath );
     let rolesData = await Files.loadJSON<RolesData>( this._settings.rolesPath );
     this._roles = new Map<string,Role>();
     rolesData.roles.forEach( r => this._roles.set( r.id, r ) );
@@ -177,10 +235,10 @@ export class UserManagementServer
       port: this._settings.port
     }
 
-    if ( ! this._settings.isDebugMode )
-    {
+    // if ( ! this._settings.isDebugMode )
+    // {
       listenOptions.host = "0.0.0.0";
-    }
+    // }
 
     this.app.listen(
 
@@ -200,4 +258,25 @@ export class UserManagementServer
     );
   }
 
+  async _startApps()
+  {
+    for ( let appID of this._settings.userApps )
+    {      
+      let app = UserAppFactory.create( appID, this );
+      RJLog.log( "Starting app:", app.id );
+      this._apps.push( app );
+    }
+
+    for ( let app of this._apps )
+    {
+      await app.initialize();
+
+      if ( app.schedulesTasks )
+      {
+        this.scheduler._taskSchedulers.push( app as any as iTaskScheduler );
+      }
+    }
+
+    await this._scheduler.update();
+  }
 }
\ No newline at end of file
diff --git a/node/users/UserManagementServerSettings.ts b/node/users/UserManagementServerSettings.ts
index 0f4b263..4ce6f91 100644
--- a/node/users/UserManagementServerSettings.ts
+++ b/node/users/UserManagementServerSettings.ts
@@ -17,6 +17,10 @@ export class UserManagementServerSettings
   userDBPath:string;
   rolesPath:string;
 
+  // Apps
+  appsPath:string;
+  userApps:string[];
+
   // Geo-Lite Lib
   geoLocationPath:string;
   geoAccountID:string;
diff --git a/node/users/apps/UserApp.ts b/node/users/apps/UserApp.ts
new file mode 100644
index 0000000..36edb99
--- /dev/null
+++ b/node/users/apps/UserApp.ts
@@ -0,0 +1,60 @@
+import { EventSlot } from "../../../browser/events/EventSlot";
+import { Files } from "../../files/Files";
+import { PathFilter } from "../../files/PathFilter";
+import { UserData } from "../UserData";
+import { UserManagementServer } from "../UserManagementServer";
+
+export class UserApp<AppData>
+{
+  protected _id:string;
+  get id(){ return this._id;}
+
+  protected _ums:UserManagementServer;
+  get ums(){ return this._ums }
+
+  protected _path:string;
+  get path(){ return this._path; }
+
+  readonly onFileChange = new EventSlot<string>();
+
+  constructor( id:string, ums:UserManagementServer )
+  {
+    this._ums = ums;
+    this._id = id;
+
+    this._path = Files.joinPaths( [ this._ums._settings.appsPath, this._id ] );
+  }
+
+  async initialize():Promise<void>
+  {
+    return Promise.resolve();
+  }
+
+  get schedulesTasks():boolean
+  {
+    return false;
+  }
+
+  getUserPath( userID:string ){ return Files.joinPaths( [ this.path, userID + ".json" ] ); }
+  
+  async iterateUserData( action:(ud:UserData,ad:AppData)=>Promise<void>):Promise<void>
+  {
+    await Files.forDirectChildrenIn( this.path, PathFilter.JSON,
+      async ( file ) => 
+      {
+        let id = file.fileNameWithoutExtension;
+
+        if ( ! this.ums.userDB.hasUserWithID( id ) )
+        {
+          return;
+        }
+
+        let userData = await this.ums.userDB.byID( id );
+
+        let appData = await Files.loadJSON<AppData>( file.absolutePath );
+
+        return action( userData, appData );
+      }
+    );
+  }
+}
\ No newline at end of file
diff --git a/node/users/apps/UserAppFactory.ts b/node/users/apps/UserAppFactory.ts
new file mode 100644
index 0000000..018d418
--- /dev/null
+++ b/node/users/apps/UserAppFactory.ts
@@ -0,0 +1,21 @@
+import { UserManagementServer } from "../UserManagementServer";
+import { ReminderApp } from "./reminder/ReminderApp";
+import { UserApp } from "./UserApp";
+
+export class UserAppFactory
+{
+  static create( id:string, ums:UserManagementServer ):UserApp<any>
+  {
+    let constructors = [ ReminderApp ];
+
+    for ( let c of constructors )
+    {
+      if ( c.id === id )
+      {
+        return new c( ums );
+      }
+    }
+
+    return null;
+  };
+}
\ No newline at end of file
diff --git a/node/users/apps/reminder/ReminderApp.ts b/node/users/apps/reminder/ReminderApp.ts
new file mode 100644
index 0000000..6bd03ef
--- /dev/null
+++ b/node/users/apps/reminder/ReminderApp.ts
@@ -0,0 +1,79 @@
+import { DateHelper } from "../../../../browser/date/DateHelper";
+import { DateMath } from "../../../../browser/date/DateMath";
+import { ISOTimeStamp } from "../../../../browser/date/ISOTimeStamp";
+import { PathReference } from "../../../files/PathReference";
+import { iTaskScheduler } from "../../scheduler/iTaskScheduler";
+import { Task } from "../../scheduler/Task";
+import { UserData } from "../../UserData";
+import { UserManagementServer } from "../../UserManagementServer";
+import { UserApp } from "../UserApp";
+import { MailEntry } from "./data/MailEntry";
+import { ReminderData } from "./data/ReminderData";
+
+export class ReminderApp extends UserApp<ReminderData> implements iTaskScheduler
+{ 
+  static readonly id = "reminder";
+  
+  constructor( ums:UserManagementServer )
+  { 
+    super( ReminderApp.id, ums );
+    this.onFileChange.addListener(
+      async ( filePath )=>
+      {
+        let pathReference = new PathReference( filePath );
+        let id = pathReference.fileNameWithoutExtension;
+        let user = await this.ums.userDB.byID( id );
+
+        if ( ! user )
+        {
+          console.log( "file changed:", filePath, "but no user associated" );
+          return;
+        }
+
+        let data = await pathReference.loadJSON<ReminderData>();
+
+        let tasks:Task[] =[]; 
+        this.grabTasks( user, data, this.ums.scheduler.maxDate, tasks );
+        this.ums.scheduler.scheduleTasks( tasks );
+        
+      }
+    )
+  } 
+
+  async getTasksToSchedule( maxDate:Date ):Promise<Task[]>
+  {
+    let tasks = [];
+
+    await this.iterateUserData( 
+      ( userData:UserData, reminderData:ReminderData )=>
+      {
+        this.grabTasks( userData, reminderData, maxDate, tasks );
+        return Promise.resolve();
+      }
+    );
+
+    return Promise.resolve( tasks );
+  }
+
+  grabTasks( userData:UserData, rd:ReminderData, maxDate:Date, tasks:Task[] )
+  {
+    rd.mailEntries.forEach(
+      ( me )=>
+      {
+        let date = DateHelper.parseDateExpression( me.date );
+        
+        if ( DateMath.isBefore( date, maxDate ) )
+        {
+          let task = Task.createAt( date, 
+            ()=>
+            {
+              this.ums.sendEmail( userData.email, me.subject, me.message );
+            } 
+          );
+
+          tasks.push( task )
+        }  
+      }
+    );
+  }
+}
\ No newline at end of file
diff --git a/node/users/apps/reminder/data/MailEntry.ts b/node/users/apps/reminder/data/MailEntry.ts
new file mode 100644
index 0000000..2a49369
--- /dev/null
+++ b/node/users/apps/reminder/data/MailEntry.ts
@@ -0,0 +1,24 @@
+
+import { DateHelper } from "../../../../../browser/date/DateHelper";
+import { ISOTimeStamp } from "../../../../../browser/date/ISOTimeStamp";
+import { DateExpressionLexer } from "../../../../../browser/text/lexer/DateExpressionLexer";
+import { LexerQuery } from "../../../../../browser/text/lexer/LexerQuery";
+import { RegExpUtility } from "../../../../../browser/text/RegExpUtitlity";
+import { ReminderEntry, ReminderEntryType } from "./ReminderEntry";
+
+export class MailEntry extends ReminderEntry
+{  
+  date:string;
+  subject:string;
+  message:string;
+
+  static create()
+  {
+    let me = new MailEntry();
+    ReminderEntry.initialize( me );
+
+    return me;
+  }
+
+  
+}
\ No newline at end of file
diff --git a/node/users/apps/reminder/data/ReminderData.ts b/node/users/apps/reminder/data/ReminderData.ts
new file mode 100644
index 0000000..25785af
--- /dev/null
+++ b/node/users/apps/reminder/data/ReminderData.ts
@@ -0,0 +1,13 @@
+import { MailEntry } from "./MailEntry";
+
+export class ReminderData
+{
+  mailEntries:MailEntry[];
+
+  static create()
+  {
+    let rd = new ReminderData();
+    rd.mailEntries = [];
+    return rd;
+  }
+}
\ No newline at end of file
diff --git a/node/users/apps/reminder/data/ReminderEntry.ts b/node/users/apps/reminder/data/ReminderEntry.ts
new file mode 100644
index 0000000..b3f4062
--- /dev/null
+++ b/node/users/apps/reminder/data/ReminderEntry.ts
@@ -0,0 +1,21 @@
+import { ISOTimeStamp } from "../../../../../browser/date/ISOTimeStamp";
+import { CryptoTool } from "../../../../../browser/random/CryptoTool";
+
+export enum ReminderEntryType
+{
+  Mail, Clock, Calender
+}
+
+export class ReminderEntry 
+{
+  type:ReminderEntryType;
+  id:string;
+  creationTime:ISOTimeStamp;
+
+  static initialize( r:ReminderEntry )
+  {
+    r.id = CryptoTool.randomUUID();
+    r.type = ReminderEntryType.Mail;
+    r.creationTime = ISOTimeStamp.now();    
+  }
+}
\ No newline at end of file
diff --git a/node/users/handlers/HandlerGroups.ts b/node/users/handlers/HandlerGroups.ts
index 24e5e81..e4b0898 100644
--- a/node/users/handlers/HandlerGroups.ts
+++ b/node/users/handlers/HandlerGroups.ts
@@ -6,6 +6,9 @@ import { LoginHandler } from "./_/login";
 import { LogoutHandler } from "./_/logout";
 import { RequestPasswordChangeHandler } from "./_/request-password-change";
 import { SignUpHandler } from "./_/signup";
+import { AppsCanUseHandler } from "./apps/can-use";
+import { AppsLoadHandler } from "./apps/load";
+import { AppsSaveHandler } from "./apps/save";
 
 export class HandlerGroups
 {
@@ -21,7 +24,12 @@ export class HandlerGroups
       new InfoHandler(),
 
       new RequestPasswordChangeHandler(),
-      new ChangePasswordHandler()
+      new ChangePasswordHandler(),
+
+      new AppsCanUseHandler(),
+      new AppsSaveHandler(),
+      new AppsLoadHandler(),
+      
     ];
 
     return defaultHandlers;
diff --git a/node/users/handlers/_/confirm-signup.ts b/node/users/handlers/_/confirm-signup.ts
index 3e1fd56..801e399 100644
--- a/node/users/handlers/_/confirm-signup.ts
+++ b/node/users/handlers/_/confirm-signup.ts
@@ -21,7 +21,7 @@ export class ConfirmSignUpHandler extends RequestHandler
 
     if ( ! result )
     {
-      return this.sendError( "User signup confimration failed" );
+      return this.sendError( "User signup confirmation failed" );
     }
 
     return this.sendInfo( "User creation confirmed" );
diff --git a/node/users/handlers/apps/UserCanUseApp.ts b/node/users/handlers/apps/UserCanUseApp.ts
new file mode 100644
index 0000000..4b867c8
--- /dev/null
+++ b/node/users/handlers/apps/UserCanUseApp.ts
@@ -0,0 +1,38 @@
+
+import { FastifyRequest, FastifyReply } from 'fastify';
+import { Message } from '../../../../browser/messages/Message';
+import { RequestRequirement } from '../../requirements/RequestRequirement';
+import { Permission } from '../../permissions/Permission';
+
+export class UserCanUseApp extends RequestRequirement
+{
+
+  async handle( request:FastifyRequest, reply:FastifyReply ):Promise<Message[]>
+  {
+    let requestBody = request.body;
+    let appData = requestBody as { token:string, appID:string };
+    
+    if ( ! appData )
+    {
+      return this.sendError( "No token data" );
+    }
+
+    if ( this.ums._settings.userApps.indexOf( appData.appID ) == -1 )
+    {
+      return this.sendError( "Invalid app id: " + appData.appID + ". Defined apps:" + this.ums._settings.userApps.join( ", " )  ); 
+    }
+    
+    let user = await this.ums.getUser( request );
+
+    let appPermissionID = "apps." + appData.appID; 
+
+    let hasPermission = await this.ums.userDB.hasPermission( user, appPermissionID );
+
+    if ( ! hasPermission )
+    {
+      return this.sendError( "Permission for app not found" );
+    }
+
+    return this.giveOK();
+  }
+}
diff --git a/node/users/handlers/apps/can-use.ts b/node/users/handlers/apps/can-use.ts
new file mode 100644
index 0000000..9182759
--- /dev/null
+++ b/node/users/handlers/apps/can-use.ts
@@ -0,0 +1,19 @@
+import { RequestHandler, RequestType } from "../../RequestHandler";
+import { FastifyRequest, FastifyReply } from 'fastify';
+import { UserIsLoggedIn } from "../../requirements/user/UserIsLoggedIn";
+import { UserCanUseApp } from "./UserCanUseApp";
+
+
+export class AppsCanUseHandler extends RequestHandler
+{
+  static url = "/apps/can-use";
+  constructor()
+  { 
+    super( RequestType.POST, AppsCanUseHandler.url, [ new UserIsLoggedIn(), new UserCanUseApp() ] ); 
+  }
+
+  async _handle( request:FastifyRequest, reply:FastifyReply )
+  { 
+    return this.sendInfo( "Can use" );
+  }
+}
\ No newline at end of file
diff --git a/node/users/handlers/apps/load.ts b/node/users/handlers/apps/load.ts
new file mode 100644
index 0000000..4c642d8
--- /dev/null
+++ b/node/users/handlers/apps/load.ts
@@ -0,0 +1,36 @@
+import { RequestHandler, RequestType } from "../../RequestHandler";
+import { FastifyRequest, FastifyReply } from 'fastify';
+import { UserIsLoggedIn } from "../../requirements/user/UserIsLoggedIn";
+import { UserCanUseApp } from "./UserCanUseApp";
+import { FilesSync } from "../../../files/FilesSync";
+import { Files } from "../../../files/Files";
+
+
+export class AppsLoadHandler extends RequestHandler
+{
+  static url = "/apps/load";
+  constructor()
+  { 
+    super( RequestType.POST, AppsLoadHandler.url, [ new UserIsLoggedIn(), new UserCanUseApp() ] ); 
+  }
+
+  async _handle( request:FastifyRequest, reply:FastifyReply )
+  { 
+    let requestBody = request.body;
+    let appData = requestBody as { appData: any, appID:string };
+    
+    let user = await this.getUser();
+    let filePath = Files.joinPaths( [ this._ums._settings.appsPath, appData.appID, user.id + ".json" ] );
+
+    let exists = await Files.exists( filePath );
+
+    if ( ! exists )
+    {
+      return this.sendInfo( "No data saved" );
+    }
+
+    let data = await Files.loadJSON<any>( filePath );
+    
+    return this.sendDataInfo( "Data loaded", data );
+  }
+}
\ No newline at end of file
diff --git a/node/users/handlers/apps/save.ts b/node/users/handlers/apps/save.ts
new file mode 100644
index 0000000..3dbec7b
--- /dev/null
+++ b/node/users/handlers/apps/save.ts
@@ -0,0 +1,34 @@
+import { RequestHandler, RequestType } from "../../RequestHandler";
+import { FastifyRequest, FastifyReply } from 'fastify';
+import { UserIsLoggedIn } from "../../requirements/user/UserIsLoggedIn";
+import { UserCanUseApp } from "./UserCanUseApp";
+import { FilesSync } from "../../../files/FilesSync";
+import { Files } from "../../../files/Files";
+
+
+export class AppsSaveHandler extends RequestHandler
+{
+  static url = "/apps/save";
+  constructor()
+  { 
+    super( RequestType.POST, AppsSaveHandler.url, [ new UserIsLoggedIn(), new UserCanUseApp() ] ); 
+  }
+
+  async _handle( request:FastifyRequest, reply:FastifyReply )
+  { 
+    let requestBody = request.body;
+    let appData = requestBody as { appData: any, appID:string };
+    
+    let user = await this.getUser();
+    let filePath = Files.joinPaths( [ this._ums._settings.appsPath, appData.appID, user.id + ".json" ] );
+
+    await Files.ensureParentDirectoryExists( filePath );
+    await Files.saveJSON( filePath, appData.appData, true );
+
+    let app = this._ums.apps.find( a => a.id === appData.appID );
+    this._ums.onFileChanged.dispatch( filePath );
+    app.onFileChange.dispatch( filePath );
+    
+    return this.sendInfo( "Data saved" );
+  }
+}
\ No newline at end of file
diff --git a/node/users/permissions/Role.ts b/node/users/permissions/Role.ts
index 5ee4897..27d215a 100644
--- a/node/users/permissions/Role.ts
+++ b/node/users/permissions/Role.ts
@@ -2,6 +2,9 @@ import { Permission } from "./Permission";
 
 export class Role
 {
+  static readonly User = "user";
+  static readonly Admin = "admin";
+
   id:string;
   inherits:string;
   permissions:Permission[];
diff --git a/node/users/requirements/RequestRequirement.ts b/node/users/requirements/RequestRequirement.ts
index 5a19a05..9977ada 100644
--- a/node/users/requirements/RequestRequirement.ts
+++ b/node/users/requirements/RequestRequirement.ts
@@ -2,12 +2,16 @@ import { RequestHandler } from "../RequestHandler";
 import { FastifyRequest, FastifyReply } from 'fastify';
 import { UserManagementServer } from "../UserManagementServer";
 import { Message } from "../../../browser/messages/Message";
+import { ErrorInfo } from "../ErrorInfo";
+import { MessageTypes } from "../../../browser/messages/MessageType";
 
 export abstract class RequestRequirement
 {
-  _isGlobal:boolean = false;
-  _ums:UserManagementServer;
-  _handler:RequestHandler = null;
+  private _isGlobal:boolean = false;
+  private _ums:UserManagementServer;
+  private _handler:RequestHandler = null;
+  get handler(){ return this._handler; }
+  get ums() { return this._isGlobal ? this._ums : this._handler._ums };
 
 
   initialize( handler:RequestHandler ):Promise<void> 
@@ -25,6 +29,17 @@ export abstract class RequestRequirement
   }
 
 
+  sendError( message:string, errorInfo:ErrorInfo = undefined ):Promise<Message[]>
+  {
+    let messages = [ Message.Error( message ) ];
+    return Promise.resolve( messages );
+  } 
+
+  giveOK():Promise<Message[]>
+  {
+    return Promise.resolve( [] );
+  }
+
   abstract handle( request:FastifyRequest, reply:FastifyReply ):Promise<Message[]>
   
 }
\ No newline at end of file
diff --git a/node/users/requirements/security/NotTooManyRequests.ts b/node/users/requirements/security/NotTooManyRequests.ts
index 8d38ee5..86b265f 100644
--- a/node/users/requirements/security/NotTooManyRequests.ts
+++ b/node/users/requirements/security/NotTooManyRequests.ts
@@ -26,7 +26,7 @@ export class NotTooManyRequests extends RequestRequirement
       
       if ( ! DateMath.isExpired( new Date( blockTime +  this._blockDuration ) ) )
       {
-        return Promise.resolve( [ Message.Error( "User blocked" ) ] );
+        return this.sendError( "User blocked" ); 
       } 
     }
 
@@ -34,10 +34,10 @@ export class NotTooManyRequests extends RequestRequirement
 
     if ( ! valid )
     {
-      return Promise.resolve( [ Message.Error( "Too many requests" ) ] );
+      return this.sendError( "Too many requests" );
     }
 
-    return Promise.resolve( [] );
+    return this.giveOK();
   }
 
   async updateIP( ip:string ):Promise<boolean>
diff --git a/node/users/requirements/user/UserHasPermission.ts b/node/users/requirements/user/UserHasPermission.ts
index 13606f2..d9bb002 100644
--- a/node/users/requirements/user/UserHasPermission.ts
+++ b/node/users/requirements/user/UserHasPermission.ts
@@ -15,17 +15,17 @@ export class UserHasPermission extends RequestRequirement
 
   async handle( request:FastifyRequest, reply:FastifyReply ):Promise<Message[]>
   {
-    let user = await this._handler.getUser();
+    let user = await this.ums.getUser( request );
     
-    let userDB = this._handler.userDB;
+    let userDB = this.ums.userDB;
 
     let hasPermission = await userDB.hasPermission( user, this._permissionID ); 
 
     if ( ! hasPermission )
     {
-      return Promise.resolve( [ Message.Error( "User has no permission for " + this._permissionID ) ] );
+      return this.sendError( "User has no permission for " + this._permissionID );
     }
 
-    return Promise.resolve( [] );
+    return this.giveOK();
   }
 }
\ No newline at end of file
diff --git a/node/users/requirements/user/UserIsLoggedIn.ts b/node/users/requirements/user/UserIsLoggedIn.ts
index 802cc66..52b903c 100644
--- a/node/users/requirements/user/UserIsLoggedIn.ts
+++ b/node/users/requirements/user/UserIsLoggedIn.ts
@@ -13,27 +13,27 @@ export class UserIsLoggedIn extends RequestRequirement
 
     if ( ! tokenData )
     {
-      return Promise.resolve( [ Message.Error( "No token data" )] );
+      return this.sendError( "No token data" );
     }
 
     let tokenID = tokenData.token;
 
-    let session = this._handler._ums._sessions.get( tokenID );
+    let session = this.ums._sessions.get( tokenID );
 
     if ( ! session )
     {
-      return Promise.resolve( [ Message.Error( "No session for token:" + tokenID )] );
+      return this.sendError( "No session for token:" + tokenID );
     }
 
-    let token = this._handler._ums.tokenDB._tokens.get( tokenID );
+    let token = this.ums.tokenDB._tokens.get( tokenID );
 
-    let isValid = await this._handler._ums.tokenDB.validate( token, request.ip );
+    let isValid = await this.ums.tokenDB.validate( token, request.ip );
 
     if ( ! isValid )
     {
-      return Promise.resolve( [ Message.Error( "Invalid token"  + tokenID )] );
+      return this.sendError( "Invalid token"  + tokenID );
     }
 
-    return Promise.resolve( [] );  
+    return this.giveOK();
   }
 }
diff --git a/node/users/scheduler/Scheduler.ts b/node/users/scheduler/Scheduler.ts
new file mode 100644
index 0000000..7cb54d1
--- /dev/null
+++ b/node/users/scheduler/Scheduler.ts
@@ -0,0 +1,141 @@
+import { MinPriorityQueue } from '@datastructures-js/priority-queue';
+import { Arrays } from '../../../browser/tools/Arrays';
+import { DateHelper } from '../../../browser/date/DateHelper';
+import { DateMath } from '../../../browser/date/DateMath';
+import { Task } from './Task';
+import { iTaskScheduler } from './iTaskScheduler';
+import { RJLog } from '../../log/RJLog';
+
+export class Scheduler
+{
+  // [ Tasks ]
+  _queue:Task[] = [];
+  _scheduledTasks = new Set<string>();
+
+  // [ Next Task ]
+  _taskTimerCallback:NodeJS.Timeout;
+  _nextTaskID:string;
+
+  // [ Settings ]
+  _maxScheduleDurationDays:number = 1;
+
+  // [ Schedulers ]
+  _taskSchedulers:iTaskScheduler[] = []; 
+  get taskSchedulers(){ return this._taskSchedulers; }
+
+  constructor()
+  {
+    this._queue =[];
+    this._taskTimerCallback = null;
+    this._nextTaskID = null;
+  }
+
+  get maxDate():Date
+  {
+    return DateMath.fromNowAddDays( this._maxScheduleDurationDays );
+  }
+
+  async update()
+  {
+    let maxDate = this.maxDate;
+
+    let allTasks:Task[] = [];
+
+    for ( let ts of this._taskSchedulers )
+    {
+      let tasks = await ts.getTasksToSchedule( maxDate );
+      allTasks = allTasks.concat( tasks );
+    }
+
+    this.scheduleTasks( allTasks );
+  }
+
+
+  scheduleTasks( tasks:Task[] )
+  {   
+    let maxDate = DateMath.fromNowAddDays( this._maxScheduleDurationDays );
+    tasks = tasks.filter( t => ! this._scheduledTasks.has( t.id ) && ! DateMath.isAfter( t.date, maxDate ) );
+    
+
+    this._queue = this._queue.concat( tasks );
+    tasks.forEach( t => this._scheduledTasks.add( t.id ) );
+
+    this._queue.sort( ( a, b ) => { return a.date.getTime() - b.date.getTime() } );
+
+    let newNextTask = this._queue[ 0 ];
+
+    if ( this._nextTaskID && newNextTask.id != this._nextTaskID )
+    {
+      this._resetTimer();
+    }
+
+    this._updateTimer();
+  }
+
+  protected _resetTimer() 
+  {
+    if ( this._taskTimerCallback ) 
+    {
+      clearTimeout( this._taskTimerCallback );
+      this._taskTimerCallback = null;
+    }
+
+    this._nextTaskID = null;
+  }
+
+  protected _updateTimer() 
+  {
+    // RJLog.log( "_updateTimer:" );
+
+    if ( this._taskTimerCallback || this._queue.length == 0 ) 
+    {
+      // RJLog.log( "Nothing to do. Has Timer:", this._taskTimerCallback, "Queue Length:", this._queue.length );
+      return;
+    }      
+
+    let task = this._queue[ 0 ];
+    this._nextTaskID = task.id;
+
+    let delay = Math.max( 0, task.date.getTime() - Date.now() );
+
+    RJLog.log( "delaying:", delay );
+
+    this._taskTimerCallback = setTimeout(
+      () => 
+      {
+        this._taskTimerCallback = null;
+        Arrays.remove( this._queue, task );
+        this._scheduledTasks.delete( task.id );
+        this._nextTaskID = null;
+
+        try 
+        {
+          task.action();
+        }
+        catch( e )
+        {
+          RJLog.log( e ); 
+        }
+
+        this._updateTimer();
+
+      }, 
+      delay
+    );
+  }
+
+  cancelTask( id:string ): void 
+  {
+    let index = this._queue.findIndex( e => e.id === id );
+    
+    if ( index === -1 )
+    {
+      return;
+    }
+
+    Arrays.removeAt( this._queue, index );
+
+    this._resetTimer();
+    this._updateTimer();
+  }
+}
\ No newline at end of file
diff --git a/node/users/scheduler/Task.ts b/node/users/scheduler/Task.ts
new file mode 100644
index 0000000..c1a0469
--- /dev/null
+++ b/node/users/scheduler/Task.ts
@@ -0,0 +1,28 @@
+import { MinPriorityQueue } from '@datastructures-js/priority-queue';
+import { Arrays } from '../../../browser/tools/Arrays';
+import { DateHelper } from '../../../browser/date/DateHelper';
+import { DateMath } from '../../../browser/date/DateMath';
+
+export class Task
+{
+  id:string;
+  date:Date;
+  action:()=>void;
+
+  static createIn( duration:number, action:()=>void )
+  {
+    let date = DateMath.fromNowAddSeconds( duration );
+    return Task.createAt( date, action );
+  }
+
+  static createAt( date:Date, action:()=>void )
+  {
+    let task = new Task();
+
+    task.id = crypto.randomUUID();
+    task.action = action;
+    task.date = date;
+    
+    return task;
+  }
+}
\ No newline at end of file
diff --git a/node/users/scheduler/iTaskScheduler.ts b/node/users/scheduler/iTaskScheduler.ts
new file mode 100644
index 0000000..42c12a6
--- /dev/null
+++ b/node/users/scheduler/iTaskScheduler.ts
@@ -0,0 +1,7 @@
+import { Scheduler } from "./Scheduler";
+import { Task } from "./Task";
+
+export interface iTaskScheduler
+{
+  getTasksToSchedule( maxDate:Date ):Promise<Task[]>;
+}
\ No newline at end of file