When I tapped on my app, it opened then popped back to homescreen. I downloaded it again, but it still didn't work. What should I do?
iOS: Troubleshooting applications purchased from the App Store
Restore from backup. See:
iOS: How to back up
Restore to factory settings/new iPod
iOS: How to back up your data and set up as a new device
In the future please do not post in such a large font. It is hard to read
Retrieving data ...