HOWEVER, it does not always work this way:
- PadKeys will never be shown for password fields, due to security restrictions in iOS.
- Individual apps may choose to deliberately disable third-party keyboards for reasons of their own. For example banking apps often disable them everywhere.
- Sometimes, due to iOS bugs, some apps don't "get the message" right away that there is a new keyboard available. Ironically it's often Apple's own apps, like Safari and Mail, that have this problem.
If you like, we recommend reporting this problem directly to Apple, either via http://www.apple.com/feedback/ipad.html or via their bug reporter if you have a developer account.