[bornfreddy]

Tangential: if updates bother you, you might want to give NetGuard a try (not affiliated). FOSS, though the pro version license costs $5 iirc. It is a great way to make apps behave nicely - even Firefox is too chatty (telemetry & co.) for my taste. Since updates are often from a different domain, you can just block them. How it works is that all the traffic on the phone is routed through a local (just an app on your phone!) VPN where it can be logged and filtered. Brilliant idea.

As a bonus, it is also very satisfying watching apps try to connect to various ad networks and spy agencies^W^W Google unsuccessfully.

[applefangirl]

I use a similiar app on my Mac. It helps me catch poorly behaving apps so I can remove them.

[j5155]

PiHole is similar to this but self-hosted (and also blocks ads)

[reitanuki]

NetGuard is on-device, can't get much more 'self-hosted' than that. Can PiHole filter per-app though? I wouldn't have thought so. NG can and it's the main reason I use it.