FRITZ!App Fon Lab, developed by AVM GmbH, is a free Android application that provides a technical preview of upcoming features in FRITZ!App Fon for the FRITZ!Box router. This app allows you to connect to the FRITZ!Box via WLAN, enabling you to use your mobile for calls over the fixed line or the Internet.

With FRITZ!App Fon Lab, you can experience the upcoming features of FRITZ!App Fon for the FRITZ!Box router before their official release. This app helps you to make phone calls from your mobile phone over the fixed line or the Internet.

The app is easy to use and navigate, and it provides a seamless connection with the FRITZ!Box router. Overall, FRITZ!App Fon Lab is a great tool for those who want to stay ahead of the game and experience the latest features before anyone else.