diff --git a/apps/documenteditor/main/index.html b/apps/documenteditor/main/index.html
index 81e239298..033f6c1e3 100644
--- a/apps/documenteditor/main/index.html
+++ b/apps/documenteditor/main/index.html
@@ -144,7 +144,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/documenteditor/main/index.html.deploy b/apps/documenteditor/main/index.html.deploy
index efb5164e4..f8a97819b 100644
--- a/apps/documenteditor/main/index.html.deploy
+++ b/apps/documenteditor/main/index.html.deploy
@@ -145,7 +145,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/presentationeditor/main/index.html b/apps/presentationeditor/main/index.html
index 52070d126..b8d706261 100644
--- a/apps/presentationeditor/main/index.html
+++ b/apps/presentationeditor/main/index.html
@@ -180,7 +180,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/presentationeditor/main/index.html.deploy b/apps/presentationeditor/main/index.html.deploy
index eeffda167..0c8eb334f 100644
--- a/apps/presentationeditor/main/index.html.deploy
+++ b/apps/presentationeditor/main/index.html.deploy
@@ -182,7 +182,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/presentationeditor/main/index.reporter.html b/apps/presentationeditor/main/index.reporter.html
index a1f9a42b1..3877c6290 100644
--- a/apps/presentationeditor/main/index.reporter.html
+++ b/apps/presentationeditor/main/index.reporter.html
@@ -130,7 +130,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         window.onbeforeunload = function() {
             window.postMessage("{ \"reporter_command\" : \"end\" }", "*");
diff --git a/apps/presentationeditor/main/index.reporter.html.deploy b/apps/presentationeditor/main/index.reporter.html.deploy
index 16f444585..1ab806c24 100644
--- a/apps/presentationeditor/main/index.reporter.html.deploy
+++ b/apps/presentationeditor/main/index.reporter.html.deploy
@@ -130,7 +130,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/spreadsheeteditor/main/index.html b/apps/spreadsheeteditor/main/index.html
index 718b32b12..1f0df81ad 100644
--- a/apps/spreadsheeteditor/main/index.html
+++ b/apps/spreadsheeteditor/main/index.html
@@ -180,7 +180,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/spreadsheeteditor/main/index.html.deploy b/apps/spreadsheeteditor/main/index.html.deploy
index 247a4b78b..cafb71dd4 100644
--- a/apps/spreadsheeteditor/main/index.html.deploy
+++ b/apps/spreadsheeteditor/main/index.html.deploy
@@ -182,7 +182,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/spreadsheeteditor/main/index_internal.html b/apps/spreadsheeteditor/main/index_internal.html
index ffa6c2ac7..72175b2c0 100644
--- a/apps/spreadsheeteditor/main/index_internal.html
+++ b/apps/spreadsheeteditor/main/index_internal.html
@@ -111,7 +111,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },
diff --git a/apps/spreadsheeteditor/main/index_internal.html.deploy b/apps/spreadsheeteditor/main/index_internal.html.deploy
index 73ba16dc1..5e88aef87 100644
--- a/apps/spreadsheeteditor/main/index_internal.html.deploy
+++ b/apps/spreadsheeteditor/main/index_internal.html.deploy
@@ -113,7 +113,9 @@
     </style>
 
     <script>
-        document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
+        // don't add zoom for mobile devices
+        if (!(/android|avantgo|playbook|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent || navigator.vendor || window.opera)))
+            document.getElementsByTagName('html')[0].setAttribute('style', 'zoom: ' + 1 / (window.devicePixelRatio < 2 ? window.devicePixelRatio : window.devicePixelRatio / 2) + ';');
 
         var userAgent = navigator.userAgent.toLowerCase(),
             check = function(regex){ return regex.test(userAgent); },