Android
Manage App Permissions with the Permission Manager auf Android
The Permission manager sorts app access by function instead of by app. Pick a permission like Camera, Microphone, or Location, and you get a full list of every app that has requested it, split into Allowed and Not allowed.
This view matters because an app's own settings page only shows what that single app can do. The Permission manager flips the perspective: you see all apps competing for one sensitive function at once, which makes it far easier to spot an app that has no obvious reason to touch your location or microphone.
To reach it, go to Tap on Settings ➔ Tap on Security & privacy ➔ Tap on Privacy ➔ Tap on Permission manager. Then pick the function you want to review with Choose a Permission, followed by Choose an App from the resulting list.
On the app's detail screen, confirm your decision with Select Allow or Don't allow. Changes apply immediately, no restart needed.
Revoking a permission here does not uninstall or disable the app itself. Some apps may simply lose a feature (a scanner app without camera access can't scan), while others might prompt again the next time that function is needed.