FRITZ!App Fon

AVM GmbH

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

Ratings and reviews

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).

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.

The app is usable and feature rich. However, the app will not create notifications (unlike say WhatsApp) for missed calls even if it was in WiFi-range of the Fritzbox during the missed call. I use Xiaomi phones and don't keep the app running after making calls. Edit: regardless of the comment by AVM below: the app does not create notifications for missed calls visible on the lock screen. Confirmed on two different phones made in 2021 and 2025.

What’s new

NEW: Callers can be held
Improved: Improvements to stability and details