iOS · iPhone
Fix iPhone Apps Crashing or Closing Unexpectedly
Source-checked About 10 minutes
Answer
Close and reopen the app, restart the iPhone, then update the app and iOS. Delete and redownload the app only after confirming that important app data is synced or backed up.
Close and reopen the app
Open the App Switcher, find the affected app, swipe it away, then open it again.
Restart the iPhone
Turn the iPhone off and back on, then test the same action in the app.
Update the app and iOS
Open App Store, select the account button and install the app update. Also check Settings > General > Software Update.
Check before deleting
Confirm that important app data is synced or backed up. Deleting can remove data stored only on the device.
Delete and redownload
Remove the app, download it again from App Store, sign in if required, and test it.
Retest the original symptom
The original action works twice after restart or update while signed-in data, purchases, and permissions remain intact.
Troubleshoot an iPhone app crash
If the crash returns at one action, deletion would remove unsynced data, or the developer reports a continuing service issue, stop broad resets and return to the last known state. Capture the exact error, versions, device or account scope, and failed step before using the linked official support channel.
Video walkthrough
Sources and verification
Checked against official documentation on . Scope: iPhone.
Follow the linked first-party guidance if labels differ after a platform or app update.