App Ops - modifies the settings of "appops" in Android system
PilferShush Jammer - Block unwanted use of onboard microphone
AppOpsX - AppOpsX is a front-end application for the Android AppOpsService. It allows you to restrict app permissions.
DNS66 - Local vpn for adblocking.
Blokada - The best ad blocker for Android. Free and open source.
Pi-hole - Pi-hole is a multi-platform, network-wide ad blocker.