Used to use pocket cast instead of this, its great

If you have a pixel you can turn on call screening for unknown numbers. Ive been using it for a couple years now on my pixel and my phone hardly ever rings now, its fantastic

Phone > settings > call screen > automatically screen calls + maximum protection.

“if the batteries have a shorter lifetime than the device” sounds like it could be exploited though, well folks the processor can only last 2 years on these new phones because of (insert random corpo bullshit here)