[mathfailure]

I don't understand the comments to this post. Don't people use firewalls anymore to limit internet access only to the apps really needing it?

[atmanactive]

Could you please recommend a comfortable personal firewall app for Android?

[ies7]

Rethink: dns + firewall + vpn

[rationalist]

No, most people do not.

[fg137]

Firewalls are already a pain for desktop OS. They are basically unusable on mobile for normal users.

[PennRobotics]

I had the goal to eliminate annoying ads in some apps that I use. I deleted the user data for those apps and also applied restrictions so they could no longer access internet. Ads still showed up.

I mostly stopped using these types of apps and switched to F-Droid alternatives.