Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased. http://support.apple.com/kb/ht1430
iOS 7: Help with how to fix a crashing app on iPhone, iPad (Mini), and iPod Touch
Troubleshooting apps purchased from the App Store
Delete the app and redownload.
Downloading Past Purchases from the iTunes Store, App Store and iBooks Store
I've discovered that it seems ios7.1 is causing the native apple help system to crash.
Numbers, pages and keynote all crash when you access their help system
I have this problem in both my iPad 3 and iPhone 5
I'm not sure if it has something to do with my Apple ID since it goes across devices.
I've already tried
+ a hard restart and
+ deleting the apps then reinstalling them and
+ shutting off iCloud but
nothing has fixed it
This fixed my problem ...
Goto Settings->General->Accessibility->Button Shapes: make sure it's set to OFF
Thanks to Mike , From his post...
This helped meRe: Anyone else experience iWork 2.2 apps crashing?
Apr 4, 2014 1:45 AM (in response to MikeHejjas)
This is a 2nd update to my original post. After the iWork Team received my crash dumps, they sent email asking if I had any Accessibility features enabled, among other things. I did. To make a long story short, I had Settings->General->Accessibility->Button Shapes (newly awailable in iOS 7.1) set to On, and when I changed it back to Off (the default value), all five apps stopped crashing when I accessed their Help pages. Turning that setting back On immediately caused the crashes to reoccur. I sent email to the iWork Team telling them of my findings. So, at least in my case, the workaround solution is to turn that setting Off if I want to access Help, and hopefully Apple will provide the actual fix (most likely in an incremental release to iOS 7.1) in the near future...