diff --git a/i18n/de.i18n.json b/i18n/de.i18n.json
index 7618d3db852c604fec21c3e2fa347418c39d917e..d14b65e3dbd7a981b892fe8c956f8f711f439ce9 100644
--- a/i18n/de.i18n.json
+++ b/i18n/de.i18n.json
@@ -1591,7 +1591,6 @@
       "zoomTextReset": "Zurücksetzen",
       "pomodoro": "Zwischen Uhr und Timer wechseln",
       "showHelp": "Hilfe",
-      "arsnovaApp": "Befrage dein Publikum mit dem Audience-Response-System ARSnova auf arsnova.thm.de",
       "arsnovaClick": "Befrage dein Publikum mit arsnova.click, der spielbasierten Variante von ARSnova",
       "arsnovaLite": "Befrage dein Publikum mit dem Audience-Response-System ARSnova auf beta.arsnova.eu",
       "hideSidebar": "Verberge die Rand-Buttons",
diff --git a/i18n/en.i18n.json b/i18n/en.i18n.json
index ca3190703f16fd2b35c40b7f996a04797cf342f2..8f10d001a828b6d1c815c3010f7a09584249aaef 100644
--- a/i18n/en.i18n.json
+++ b/i18n/en.i18n.json
@@ -1592,7 +1592,6 @@
       "zoomTextReset": "Zurücksetzen",
       "pomodoro": "Zwischen Uhr und Timer wechseln",
       "showHelp": "Hilfe",
-      "arsnovaApp": "Befrage dein Publikum mit dem Audience-Response-System ARSnova auf arsnova.thm.de",
       "arsnovaClick": "Befrage dein Publikum mit arsnova.click, der spielbasierten Variante von ARSnova",
       "arsnovaLite": "Befrage dein Publikum mit dem Audience-Response-System ARSnova auf beta.arsnova.eu",
       "hideSidebar": "Verberge die Rand-Buttons",
diff --git a/imports/ui/card/sidebar/item/arsnovaApp.html b/imports/ui/card/sidebar/item/arsnovaApp.html
deleted file mode 100644
index 2f6eb8b04c6622cdb8ff10e45d32018b8448c423..0000000000000000000000000000000000000000
--- a/imports/ui/card/sidebar/item/arsnovaApp.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<template name="cardSidebarItemArsnovaApp">
-    {{#if isCardsetOwner this._id}}
-        {{#unless isIOSSafari}}
-            <img class="hidden-xs showArsnovaApp card-button btn cardHeaderItem"
-                 data-type="cardNavigation"
-                 src="/img/button/arsnova_app_v2.png"
-                 title="{{_ "card.tooltip.arsnovaApp"}}">
-        {{/unless}}
-    {{/if}}
-</template>
-
-<template name="arsnovaAppModal">
-    {{#unless isIOSSafari}}
-        <div class="modal" id="arsnovaAppModal" tabindex="-1" role="dialog">
-            <div class="modal-dialog">
-            </div>
-        </div>
-    {{/unless}}
-</template>
diff --git a/imports/ui/card/sidebar/item/arsnovaApp.js b/imports/ui/card/sidebar/item/arsnovaApp.js
deleted file mode 100644
index a07251743e836b9013f2fbf1bd58c0f0a991c37f..0000000000000000000000000000000000000000
--- a/imports/ui/card/sidebar/item/arsnovaApp.js
+++ /dev/null
@@ -1,46 +0,0 @@
-import "./arsnovaApp.html";
-import {Session} from "meteor/session";
-import {Template} from "meteor/templating";
-
-Session.setDefault('arsnovaAppModalActive', false);
-
-/*
- * ############################################################################
- * cardSidebarItemArsnovaApp
- * ############################################################################
- */
-
-Template.cardSidebarItemArsnovaApp.events({
-	"click .showArsnovaApp": function () {
-		$('#arsnovaAppModal').modal('show');
-	}
-});
-
-Template.cardSidebarItemArsnovaApp.onCreated(function () {
-	Session.set('arsnovaAppModalActive', false);
-});
-
-Template.cardSidebarItemArsnovaApp.onDestroyed(function () {
-	Session.set('arsnovaAppModalActive', false);
-});
-
-/*
- * ############################################################################
- * arsnovaAppModal
- * ############################################################################
- */
-
-Template.arsnovaAppModal.onRendered(function () {
-	$('#arsnovaAppModal').on('hidden.bs.modal', function () {
-		$('.showArsnovaApp').attr('src', '/img/button/arsnova_app_v2.png');
-		$('.showArsnovaApp').removeClass('pressed');
-	});
-	$('#arsnovaAppModal').on('shown.bs.modal', function () {
-		$('.showArsnovaApp').attr('src', '/img/button/arsnova_app_pressed.png');
-		$('.showArsnovaApp').addClass('pressed');
-		if (!Session.get('arsnovaAppModalActive')) {
-			Session.set('arsnovaAppModalActive', true);
-			$('#arsnovaAppModal .modal-dialog').html('<iframe id="arsnovaApp" width="600px" height="800px" frameborder="0" src="https://arsnova.thm.de/mobile/"></iframe>');
-		}
-	});
-});
diff --git a/imports/ui/card/sidebar/sidebar.js b/imports/ui/card/sidebar/sidebar.js
index 985fcbfe567d48aada6ffc4ed86181fa040b1165..1976228125d87528c5c2229ee6843e5fc0c8c589 100644
--- a/imports/ui/card/sidebar/sidebar.js
+++ b/imports/ui/card/sidebar/sidebar.js
@@ -6,7 +6,6 @@ import "./sidebar.html";
 import "./item/aspectRatio.js";
 import "./item/arsnovaClick.js";
 import "./item/arsnovaLite.js";
-import "./item/arsnovaApp.js";
 import "./item/cardList.js";
 import "./item/backToCardset.js";
 import "./item/dictionary.js";