(adsbygoogle = window.adsbygoogle || []).push({}); They are crashing because of App Sync iOS 7, they have released the fix.
1. Go to sinful iPhone repo
2. Uninstall app sync, it should uninstall app cake aswell
3. After reboot install the mail/safari fix
4. Then install app sync first then app cake, don't forget to do them separately.

If you need more explanation just look at the description on the mail/ safari fix