26.2K reviews
Content rating
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About this app

Easy calling with the landline network

Make calls at home conveniently using your smartphone over your landline telephone numbers - anywhere in the Wi-Fi network of your FRITZ!Box. With the FRITZ!App Fon you benefit from the landline rates; for many providers even from flat rate telephony. HD telephony provides for crystal clear voice quality. Thanks to support for Bluetooth headsets you can enjoy complete flexibility for everyday calling and for working from home. The latest technologies mean that the FRITZ!App Fon works invisibly in the background no matter what the battery status.

The FRITZ!App Fon guides you through the easy Configuration. Simply log in by entering your FRITZ!Box password, selecting one of your landline telephone numbers, and them confirm: your smartphone is ready for landline telephony. Once it has been configured, the FRITZ!App Fon makes your smartphone ring immediately for incoming calls, just as if it were a FRITZ!Fon, the intelligent all-rounder for your home network with FRITZ!. Incoming calls ring simultaneously on your telephones and smartphones. You decide which device should pick up the call. If you would like your smartphone to ring only for certain landline telephone numbers, select only these numbers in the settings of FRITZ!App Fon.

The FRITZ!App Fon is the ideal telephony extension for your FRITZ!Box. Be it a handset for the new roommate in your shared apartment, an additional telephone for working from home, or the convenience of the smartphone that's always handy: with the FRITZ!App Fon you always have a practical solution in no time at all. It is easy to use the FRITZ!App Fon on multiple smartphones.

FRITZ!App Fon functions at a glance

Makes telephone calls over the landline with your smartphone
Top voice quality thanks to HD telephony
Supports Bluetooth headsets
Accesses the telephone books on the FRITZ!Box and smartphone contacts
Displays the names of known contacts during calls
Updated on
Oct 19, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity and App info and performance
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

24.8K reviews
Grégoire Miret
May 13, 2021
After some struggles with poor audio quality (voice was barely understandable, I restarted, reseted, reinstalled...), it eventually works ! And I absolutely love the ability to make landline call from my mobile phone ! :) Thanks for the new UI, it looks much better :) And thanks for the answer, I have now my phone contacts once only :) Remain the ability to make calls directly from the Android interface (as there is the option to make Skype or WhatsApp call from a contact).
7 people found this review helpful
Did you find this helpful?
April 20, 2021
Hello, when the phone book is open in the FRITZ!App Fon, you can select in the menu (three dots on the top right) which phone books should be displayed. If necessary, please send us feedback with log, support data and the ID "#appfid2920". We have noted your wish to use the Android interface.
Arne Aerts
August 19, 2022
UI looks good and app is does what it supposed to do, except vibrate. No matter which ringtone, or silent/sound mode I use, my S20 will not vibrate. Normally I always use my phone in silent mode, so this basically means I miss 100% of the calls. I have contacted AVM in-app ask they asked but have not heard from them since. I will update my review if I ever do. EDIT: Cs got back to me and after a reinstall and some changed settings, vibrations are coming through.
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August 24, 2022
We are pleased to read that we were able to support you with the setup and that the function of FRITZ!App Fon is now as desired. We also want to point out here, that we are sorry for the long wait responding to your feedback.
Piero FilippIN
February 10, 2024
I have imported my letsencrypt certificate in the fritzbox, but in all fritzbox android apps I can only add the fritzbox by ip. So I get a certificate warning every time I open the app, there is sn option to trust it but your choice is not saved so it's asking every time. I mean this is really poor considering I have to trust these people with my network security.
Did you find this helpful?
February 13, 2024
Hello, Thank you for your renewed feedback. As already offered several times, we will be happy to take a closer look. Please send us a message using the "Give feedback" function in the app and quote the ID "#appfid 6104349". Please also attach the log and the support data.

What's new

- NEW: The app now can also be set to Dutch, French, Polish, and Spanish
- Improved: Better stability and enhanced details