Can be easily integrated into the FritzBox. It is simply screwed onto the radiator valve instead of the heating thermostat. The installation is self-explanatory. The heating can be controlled via programmes. In a holiday home, for example, the heating can be turned up remotely via the Internet.

I recently installed the AVM FRITZ!DECT 301 thermostat (FB7590/7.01).
So far it works perfectly.
+ Easy installation
+ 24h temperature recording (the last 24h)
+ control options
? Window open detection (not enough experience yet)
? Battery life (not enough experience yet) ?