The direct answer is to review photo access app by app, compare each grant with a feature you actually use, and replace full-library access with selected-photo access whenever the platform and app support it. Finish by testing the feature with a harmless image, removing stale grants, and recording any app that genuinely needs broad access.
Build the app inventory
On iPhone, open Settings, Privacy & Security, then Photos to see apps that requested library access. Apple's app privacy controls explain that users can review categories of information and hardware access and change an app's permission later. On Android, open Settings, Apps, select an app, and review Permissions; exact labels vary by device and Android version.
List every app with photo or video access. Record its purpose, the last time you used a media feature, and whether the app creates media, imports selected files, backs up the whole library, or merely attaches an occasional image. Those are different needs and should not receive the same scope.
Prefer selected media for occasional use
Google's Android Photo Picker guidance says an app can access only the photos and videos a user selects through the picker. That is a strong fit for a messaging, marketplace, document, or profile app that needs one or a few images rather than a permanent view of the library.
If an app offers selected-photo access, choose it and add only a neutral test image. Confirm that the app can use that image but cannot browse unrelated albums. On iPhone, use the most limited Photos option shown for the app and adjust the selected items when needed. If the app cannot complete its advertised occasional-use feature without full access, check current support documentation before widening the grant.
Test before and after revocation
Create a non-sensitive test photo with a unique label. Use it through the app, then remove or narrow the photo permission. Reopen the app and verify three outcomes: the normal non-photo features still work, the app no longer browses unselected media, and the app explains how to request access again when you intentionally choose a photo feature.
Do not use customer documents, identification, medical images, children's photos, or private screenshots for the test. Also check whether the app copied the selected image to its own cloud account or project. Revoking library access does not automatically delete a copy already uploaded to the app's service.
Investigate broad-access exceptions
A photo backup service, gallery manager, or editing catalog may have a defensible need for persistent broad access. For each exception, record the core feature, account owner, sync destination, retention setting, sharing behavior, and deletion procedure. Google's Photo and Video Permissions policy distinguishes core uses that need broad access from one-time or infrequent uses that should use a system picker.
Review the app's privacy disclosure and account settings, but verify behavior on the device. Turn off automatic upload if you do not want new photos copied. Check work and personal profiles separately. If a work app needs business images, avoid granting it the personal library when a managed folder, work profile, or file picker can isolate the material.
Close the audit
Remove access from unused apps, uninstall apps you no longer trust, and set a future review date. Keep a short record with the app name, version, permission level, business or personal reason, media copied elsewhere, test result, and exception owner. Repeat the audit after major operating-system changes, app replacements, or a lost-device event.
A complete audit does not merely count permissions. It proves that every remaining grant is necessary, scoped to the smallest useful set of photos, and understood across both the phone and any cloud copy the app created.
Sources
- Control access to information in apps on iPhone — Apple Support
- Photo Picker — Google
- Details on Google Play's Photo and Video Permissions policy — Google