Start with the simple checks. Change one thing at a time so you can tell which step helped.
An app update, iOS compatibility, storage shortage or temporary service issue may be responsible. First, note what changed recently and whether the same issue affects another device. This helps separate a device-specific fault from a wider network or service issue.
Troubleshooting steps
Check the basics
Close and reopen the app, then restart the iPhone if it remains frozen. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Review the settings
Check the App Store for an update and the app maker’s service status if available. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Test one change
Confirm iPhone storage is not critically low and install compatible iOS updates. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Confirm the result
Reinstall only after checking that your account data is backed up or synced. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Helpful note
Do not delete an app if it stores unsynced files you cannot recover.
When to get more help
If these checks do not resolve the issue, contact the relevant device maker, internet provider or app support team. Include the exact model, software version, any error message, what you have already tried and when the problem began. Avoid sharing passwords, verification codes or private account details in a public forum.
For equipment that is hot, damaged, wet or making unusual electrical sounds, stop using it and seek qualified support. Do not open power supplies, batteries or mains-powered equipment.
Settings and menu names vary by model and software version. Use the manufacturer's current instructions for device-specific steps, and back up important files before making changes that could remove data.