Trying to delete an app on iPhone freezes it and then restarts it. No apps are running, all closed. Help?

Thank you James. I tried that, but the same problem persisted. Visited Apple Store Genius Bar, and they recommened syncing with iTunes and the removing the Day One app in iTunes. That enabled me to get rid of the app.

The real problem still remains: Day One app simply won't start on my iPhone. Hangs up a returns back to home screen. I downloaded the app again and same problem. Need to research some more.

One option is a complete restore of iPhone, but I'd hate to do that for just one app, no matter how much I liked it. I can still use it on iPad and Mac.

- Kaj

That's where I started from. Day One completely gave me the cold shoulder and directed me to Apple Support because "no one else had ever reported that problem". Thanks for your support.

I finally had time to do a full restore of the iPhone to it's original settings. Then downloaded Day One again before restoring any other apps and made sure it works. Now restoring rest of the apps. Case closed. Cause: unknown. Resolution: full restore. Done. Moving on to other things, like counting days to the new iPhone....