FRITZ!App Fon

3.9
28K reviews
1M+
Downloads
Content rating
USK: All ages
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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
May 20, 2025

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

3.9
26.5K reviews
Peter
February 28, 2025
poor audio quality when using phone audio. speaker phone was also problematic in the past but got fixed in recent versions. remaining issue is that when calling a person they cannot hear me loud enough when not using speaker. as soon as I enable speaker, they can hear me fine. very odd as the phone mic is nit changing, so the issue must be with the software.
1 person found this review helpful
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AVM GmbH
March 4, 2025
Hello, to solve the issue with the Audio Quality, try the following steps: https://en.avm.de/service/knowledge-base/dok/FRITZ-App-Fon/97_Poor-voice-quality-when-conducting-calls Should the issue persist, send us an in-app feedback incl. log and support data and mention the ID "#appfid 6696514".
Hartmutux Stonehenge
January 21, 2025
All newer version than 1.90.10 set the screen dark permanently (not only during the call), so it renders the phone unusable (no change with taps or the phones power-on button) -- Android 11 N105G. Only solution is to power off and reboot the phone in blind flight. The newer versions are missing the 'Advanced settings' where it was possible to keep the screen on during calls ('reduce display brightness' -- that prevented turning off the display).
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AVM GmbH
January 23, 2025
Hello, we would be happy to take a closer look. Send us a message using the ‘Give feedback’ function in the app and tell us the ID ‘#appfid 6632579’. Please also attach the log and the support data.
Seb Tru
March 31, 2021
This app is quite nice UI-wise, but it doesn't work at all. I am able to connect to the router and configuration seem fine and working, two green symbols in the app, and the app connection is visible in the router. However, when I try to call somebody, it connects and shows I were in a conversation, but there is simply neither any type of sound nor any voice - a dead audio input/output. / I located the error: It does not work with a mesh network.
3 people found this review helpful
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What’s new

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