First, delete the app:
- Touch and hold the app icon on the Home screen until the icons start to jiggle.
- Tap the "x" in the corner of the app.
- Tap Delete to remove the app and all of its data from your iPhone.
After removing the app from your iPhone, use these steps to reinstall it:
- Open the App Store on iPhone and locate the app to reinstall. If you previously purchased the app, tap Purchased to find it quickly, then tap the install button.
- If prompted, enter your iTunes Store account information.
- After the app is installed, check to see if your issue is resolved.