"We are aware of the issue related to apps crashing after update. We are currently working on resolving the issue. Stay tuned for updates. - iTunesConnect”Apple has finally acknowledged the app crashing issue on the App Store yesterday. Apparently, some newly updated apps were crashing or refuse to launch on the iPhone, iPod Touch and on the iPad. The issues stated from a corrupted app binaries that were being distributed on the App Store.
Anytime from now, all updated apps on the App Store will work. If you made to update the app before knowing the issue, give it a try to remove the non-working app and download it again.