You can download all FRITZ!Apps from the following addresses and install them without using the Google Play Store:

MyFRITZ!App 2: https://service.avm.de/downloads/fritzapps/MyFRITZ2.apk

FRITZ!App Cam: https://service.avm.de/downloads/fritzapps/FritzAppCam.apk

FRITZ!App Fon: https://service.avm.de/downloads/fritzapps/FritzAppFon.apk

FRITZ!App Media: https://service.avm.de/downloads/fritzapps/FritzAppMedia.apk

FRITZ!App TV: https://service.avm.de/downloads/fritzapps/FritzAppTV.apk

FRITZ!App WLAN: https://service.avm.de/downloads/fritzapps/FritzAppWLAN.apk