Sometimes an app freezes and the back button does nothing. Force stopping it closes the app completely, so you can open it fresh.

Android

1. Open Settings, then Apps. Choose the app.
2. Tap Force stop, then confirm.

Some phones also let you swipe the app away from the recent apps view.

iPhone

• Swipe up from the bottom of the screen and pause in the middle to open the app switcher. Swipe the app’s card up to close it.
• On iPhones with a Home button, double-press it, then swipe the app’s card up.

If it keeps freezing

• Restart the phone.
• Clear the app’s cache. See how to clear the cache on your phone.
• Update the app and check that the phone’s software is up to date.
• Free up storage. An almost-full phone can make apps freeze.
• If nothing works, reinstall the app. Back up your data first.