Most people either ignore app permissions entirely or try to lock everything down and break half their apps in the process. A more useful approach is knowing which specific permissions carry real privacy weight, and which ones are mostly harmless.

Location: the permission worth the most scrutiny

Both iPhone and Android let you choose "Always," "While using the app," or "Never" for location access (Settings → Privacy → Location Services on iPhone; Settings → Location → App permissions on Android). "Always" is rarely necessary — weather and maps apps work fine with "While using," and reserving "Always" only for apps that genuinely need background location (like a fitness tracker or a family-location app you actually use) meaningfully reduces how much you're tracked in the background.

Microphone and camera: check for surprises

Review which apps have microphone and camera access (same settings menus) — it's common to find apps you don't remember granting this to, often from an install-time prompt you clicked through quickly. Both platforms show a visual indicator (a small dot or icon) when the microphone or camera is actively in use, worth glancing at if you ever notice it when you're not expecting an app to need it.

Contacts and photos: often broader than the app needs

A permission worth checking specifically: apps with full photo library access versus "selected photos only" (iPhone offers this distinction directly when you deny full access). Many apps — a messaging app that only needs to send one photo you choose — work fine with selected-photo access rather than access to your entire library.

Notifications: not a privacy issue, but worth curating

Notification permission isn't a data-privacy concern in the same way as location or camera access, but it's worth managing for your own attention — see our guide on taming phone notifications for a more complete approach to that specific problem.

Permissions that are usually safe to leave alone

Not every permission deserves scrutiny. Things like network access (almost every app needs this to function at all) and basic device state checks are low-risk and rarely worth restricting — spending your attention on location, camera, microphone, and full-library access covers most of the actual privacy exposure.

A periodic review, not constant vigilance

Rather than obsessively checking permissions after every app install, do a broader review every few months. Both platforms have a permissions dashboard showing all apps grouped by permission type (Settings → Privacy on iPhone; Settings → Privacy → Permission manager on Android) — scan through location and camera/microphone specifically, and revoke access for anything you no longer use or don't recognize.

If an app stops working correctly after you restrict a permission, that's useful information — it tells you the permission was actually load-bearing for that app's core function, not just nice-to-have. You can always re-grant it if the restriction breaks something you actually need.

Where to focus your attention