diff --git a/frontend/src/app/components/resizer/main-menu-toggle.component.ts b/frontend/src/app/components/resizer/main-menu-toggle.component.ts
index 88150b0021..fd1ede8315 100644
--- a/frontend/src/app/components/resizer/main-menu-toggle.component.ts
+++ b/frontend/src/app/components/resizer/main-menu-toggle.component.ts
@@ -33,12 +33,13 @@ import {untilComponentDestroyed} from 'ng2-rx-componentdestroyed';
 import {MainMenuResizerComponent} from "core-components/resizer/main-menu-resizer.component";
 import {DynamicBootstrapper} from "core-app/globals/dynamic-bootstrapper";
 import {CurrentProjectService} from "core-components/projects/current-project.service";
+import {DeviceService} from "app/modules/common/browser/device.service";
 import {Injector} from "@angular/core";
 
 @Component({
   selector: 'main-menu-toggle',
   template: `
-    <div *ngIf="this.currentProject.id !== null || toggleService.isMobile" id="main-menu-toggle"
+    <div *ngIf="this.currentProject.id !== null || this.deviceService.isMobile" id="main-menu-toggle"
         aria-haspopup="true"
         [attr.title]="toggleTitle"
         (accessibleClick)="toggleService.toggleNavigation($event)"
@@ -50,18 +51,13 @@ import {Injector} from "@angular/core";
   `
 })
 
-/*
-* Groesse des Menus feststellen
-* pruefen, ob kleiner 10 -> Groesse der Sidebar setzen
-* collapsed boolean setzen, label im resizer und hamburger icon setzen
-*
-*/
 export class MainMenuToggleComponent implements OnInit, OnDestroy {
   toggleTitle:string = "";
   currentProject:CurrentProjectService = this.injector.get(CurrentProjectService);
 
   constructor(readonly toggleService:MainMenuToggleService,
               readonly cdRef:ChangeDetectorRef,
+              readonly deviceService:DeviceService,
               protected injector:Injector) {
   }
 
diff --git a/frontend/src/app/components/resizer/main-menu-toggle.service.ts b/frontend/src/app/components/resizer/main-menu-toggle.service.ts
index c794478379..db50908abd 100644
--- a/frontend/src/app/components/resizer/main-menu-toggle.service.ts
+++ b/frontend/src/app/components/resizer/main-menu-toggle.service.ts
@@ -30,6 +30,7 @@ import {Injectable} from '@angular/core';
 import {BehaviorSubject, fromEvent, Observable, Subscription} from 'rxjs';
 import {I18nService} from "core-app/modules/common/i18n/i18n.service";
 import {CurrentProjectService} from "core-components/projects/current-project.service";
+import {DeviceService} from "app/modules/common/browser/device.service";
 import {Injector} from "@angular/core";
 
 @Injectable()
@@ -58,7 +59,8 @@ export class MainMenuToggleService {
   private resizeSubscription$:Subscription;
 
   constructor(protected I18n:I18nService,
-              protected injector:Injector) {
+              protected injector:Injector,
+              readonly deviceService:DeviceService) {
   }
 
   public initializeMenu():void {
@@ -78,7 +80,7 @@ export class MainMenuToggleService {
     }
 
     // mobile version default: hide menu on initialization
-    if (this.isMobile) {
+    if (this.deviceService.isMobile) {
       this.closeMenu();
     }
   }
@@ -91,7 +93,7 @@ export class MainMenuToggleService {
     }
 
     if (!this.showNavigation) { // sidebar is hidden -> show menu
-      if (this.isMobile) { // mobile version
+      if (this.deviceService.isMobile) { // mobile version
         this.setWidth(window.innerWidth);
         // On mobile the main menu shall close whenever you click outside the menu.
         this.setupAutocloseMainMenu();
@@ -113,7 +115,7 @@ export class MainMenuToggleService {
   }
 
   public closeMenu():void {
-    if (this.isMobile) {
+    if (this.deviceService.isMobile) {
       this.saveWidth(0);
     } else {
       this.setWidth(0);
@@ -122,7 +124,7 @@ export class MainMenuToggleService {
   }
 
   public closeWhenOnMobile():void {
-    if (this.isMobile) {
+    if (this.deviceService.isMobile) {
       this.closeMenu()
     };
   }
@@ -206,10 +208,6 @@ export class MainMenuToggleService {
     }
   }
 
-  public get isMobile():boolean {
-    return (window.innerWidth < 680);
-  }
-
   public get showNavigation():boolean {
     return (this.elementWidth > 10);
   }