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Karma Firewall: FOSS application firewall for Android (github.com)
1 points by fodi 1112 days ago
2 comments

Requires no Internet permission, works by running as a local VPN service, can block Internet access of any Android app (including system apps).

Karma Firewall can be installed from F-Droid (it's not on Google Play): https://f-droid.org/packages/net.stargw.fok/

Been running it for ages, it's on this Android I'm using to send this and it's reliable.