1. I cannot log into the app.

 Possible causes:

  • No internet connection: In order to log in and out be sure you have a stable internet connection.
  • Incorrect registration: Check to make sure you have entered the correct registration data .Use the same data that you used to register on the license portal.

Tips for logging into the app:

  • Upper and lower case differentiation is important!
  • Make sure your user name and password are spelled correctly.
  • Make sure you haven’t activated the capitalization function by mistake.
  • Make sure “Klett” has been selected in the field “Editor”.
  • If you cannot remember your password, go to the license portal, click on “Forgot your password?” and follow the instructions.
  • Have you used symbols in your password? Some iOS and Android versions don’t recognize symbols like $, %, !, #, /. You should avoid all such symbols that also used as programming language or in shells.
  • Perhaps you have logged onto too many devices. You have purchased one license, which means that you cannot use our app on more than 3 devices. Please contact our Customer Service.
  • Your device is protected by a firewall which is prohibiting a connection to our server. In this case, check your security settings.
  • You have changed your password. If this is the case, please wait. Your password will be updated in our app. Please be patient - this could take up to 12 hours.

2. The app does not work.

Possible causes:

Please check that your device has the minimum requirements needed for your operating system. Should this not be the case, it will be necessary for you to update your operating system.

The system requirements for the Klett Sprachen App are:

  • Android: Version 5 upwards
  • iOS:  Version iOS 11 upwards
  • Windows:  Windows 7 upwards, minimum Intel i3 processor, at least 4 Gb RAM
  • Linux:  Ubuntu 14.04 upwards, minimum Intel Core 2 processor, at least 2 Gb RAM
  • Mac:  Mac OS X Lion upwards, minimum Intel Core 2 processor, at least 2 Gb RAM


3. I cannot download the contents or I only see a black screen.

Possible causes:

You do not have enough free space on your device to save the data. Below each downloadable content in the Klett-Language-App you will see the size in MB in brackets. Make sure you have enough space and then restart the download.

Tip: If you have finished working on a chapter, it is very easy to erase it from your device with the “ändern”(“change”) function. And don’t worry: you can always download it again if you need it.

4. I cannot save the data in the cloud or cannot download the data from the cloud.

Possible Causes:

Check your internet connection. You must have a stable connection to save or download data.

5. I cannot play the audio files.

Possible Causes:

  • The volume might be turned off. Check to make sure the loudspeaker volume is on.

6. Can I print out the exercises?

Yes! The individual exercises can be printed out - regardless of whether they have been completed or not. The textbook pages, however, cannot be printed out.

7. Can I save the exercises I have completed so that I can hand them in to be corrected?

Yes! You can either print out the exercises either empty or filled out.

8. The menu control bar is not visible

A tap will show or hide the menu bar at the top of the screen. There may be a slight delay in the reaction on tablets, which, if you tap several times, may lead to your unknowingly showing and then hiding the menu. For the menu to show, please tap just once and then wait for your device to react.

If your touch screen reacts inaccurately or with a delay, there may be several causes:

  • Clean the display. Smudges from grease or dampness can negatively influence the precision of the touch screen. Protection foils can also cause touch screens to react incorrectly.
  • In many cases the display is slow to react because the device is overloaded and cannot correctly process the commands. Restarting the device will usually solve this issue.
  • The operating system freezes when there is too little space on the internal memory. Delete some apps or move them onto an external memory card.

9.  My books are not visible in the license portal.

In exceptional cases it can take up to 2 hours before the content of a redeemed code is visible in the license portal and app.

10. I would like to use the Klett-Sprachen-App on my Android tablet.

Please download the latest version of the app from the Google Play Store.



Tel.: 0711 / 66 72 15 55

Unsere Servicezeiten:
Mo. bis Fr. 8.00 - 20.00 Uhr
Sa. 8.00 - 16.00 Uhr
Zahlung & Versandkosten

Die Zahlung erfolgt per Rechnung oder mit folgenden Karten:

Alle Preise verstehen sich inklusive Mehrwertsteuer und zuzüglich Versandkosten.
Lieferung innerhalb von 3 bis 10 Werktagen.

Besuchen Sie Ernst Klett Sprachen auf: