FRITZ!App Fon

FRITZ!App Fon

by AVM GmbH

83K ratings
100 reviews
Free

Details

  • Released
  • Updated
  • May 21, 2010
  • May 19, 2026
FRITZ!App Fon screenshot #1 for iPhone
FRITZ!App Fon screenshot #2 for iPhone
FRITZ!App Fon screenshot #3 for iPhone
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FRITZ!App Fon screenshot #5 for iPhone
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About

This app allows you to make and receive calls using your home's fixed-line network and internet connection through your FRITZ!Box. It runs in the background, ensuring you never miss a call and can easily access your phone book and answering machine.

Make calls via FRITZ!Box
Receive calls via FRITZ!Box
Background operation
Access phone book
Use answering machine
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What users say

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What's New in FRITZ!App Fon

5.5.4

May 19, 2026

- Verbesserung: Detail- und Stabilitätsverbesserungen

User reviews

iOS Badge

This is a great alternative to the traditional phone BUT could the iOS app have a badge so I know if I’ve missed a call without having to go into the app every time?

I find all the options very difficult to understand.

Hard to comprehend

Very handy

Very useful for screening out scam calls and answering on mobile

Bedingt brauchbar

Das Verbinden und Einrichten der App ist relativ einfach und verdient ein großes Lob. Allerdings verbindet sich mein Mobiltelefon nicht immer sofort reibungslos mit der FRITZ!Box.. Hinzukommt, dass die Sprachqualität laut meinen Gesprächspartnern ab und zu sehr schlecht ist. Dafür kann natürlich nun Fritz nicht unbedingt etwas, Denn meine Leitung läuft über die Telekom, aber das ist natürlich das Ergebnis, welches ich bekomme. Aufgrund der hin und wieder schlechten Gesprächsqualität, und der nicht immer gegebenen Verbindung zur FRITZ!Box, nur zwei Sterne
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Nachtrag: auf meine Rezession hat der Entwickler sehr schnell und zeitnah reagiert, und mich gebeten Daten zu senden. Zugleich wurde ein Update ausgeführt, welches die Probleme beh Jetzt läuft die App ohne Probleme und ich bin sehr zufrieden. Klasse SERVICE, man erkennt das hier der Wille zur Verbesserung gegeben ist.
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Response from developer

Hallo,  gerne schauen wir uns die beiden Probleme mal genauer an. Schicken Sie uns dazu über die Funktion "Feedback geben" in der App eine Nachricht und nennen Sie uns die ID "#appfid 6826761". Hängen Sie außerdem das Protokoll und die Support-Daten an.

Unusable

Zen connectivity is very poor despite calls to their support team and adjustments made. Calls are dropped or break up and this is particularly bad with this app. Dect quality is not much better. WiFi calling is fine on our mobiles and we have a full Fritz Mesh system.
We are going to have to drop our landline and rely totally on mobile calling. Ironically the best quality is FaceTime or WhatsApp!
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Developer apps

User experience

🐞

Reported Bugs

14 issues

No incoming calls when VPN is active

Bug

Calls not ringing in background mode

Bug

Audio delay when switching to speakerphone/headphones

Bug

Contact names not resolving in call list

Bug

App freezes during login with Fritz!Box

Bug

International dial codes (+39, +34) not working from contacts

Bug

Keypad number 1 not functioning

Bug

DECT phone caller ID (CLIP) lost when using app

Bug

App crashes on iOS 8 and older versions

Bug

Remote station occupied error messages

Bug

Permissions error requiring full admin access to login

Bug

App not running reliably in background

Bug

Connection issues after VPN usage

Bug

Incoming calls only work when app is in foreground

Bug

Requested Features

12 requests

Call transfer functionality to other extensions

Feature

Apple Watch app support with CallKit integration

Feature

Delete call list entries functionality

Feature

Search function in contact list

Feature

Fax sending capability

Feature

Mobile data network support (not just WiFi)

Feature

Visual voicemail interface

Feature

Ability to forward calls to other devices

Feature

Direct calling from iOS contacts without opening app

Feature

Blacklist management within app

Feature

Multiple account selection per call

Feature

Speakerphone functionality improvements

Feature

FAQ

What does FRITZ!App Fon do?

FRITZ!App Fon allows you to use your FRITZ!Box for making and receiving phone calls over your home's fixed-line network and internet connection. It enables you to use your iPhone, iPod, or iPad as a cordless handset for your FRITZ!Box.

How do I make calls with FRITZ!App Fon?

To make an outgoing call, simply open FRITZ!App Fon and dial the desired telephone number using your device's telephone book. The call will then be routed through your FRITZ!Box.

Is FRITZ!App Fon free to use?

Yes, FRITZ!App Fon is a free application. There are no in-app purchases or advertisements mentioned in its description.

What are the system requirements for FRITZ!App Fon?

To use FRITZ!App Fon, you need a FRITZ!Box with FRITZ!OS version 7.20 or later, and your mobile device must be running iOS 14 or later.

Can I still use other apps while FRITZ!App Fon is running?

Yes, once FRITZ!App Fon is started, it automatically runs in the background. This means you can continue to use other apps or have your device in standby mode while still being able to receive incoming calls.