Known Issue: Breakage in iOS 9
It seems in the most recent iOS 9 betas PadKeys will appear correctly the first time you use it in an app session, but then if it gets put away and then displayed again, the display will be messed up and nonfunctional.
We are investigating.
For now, a work-around is to exit the app by pressing the Home button, then come back in again.

Between our own efforts and fixes Apple implemented before the final release, things seem to be working fine under iOS 9. If you still find problems please post a new issue. Thanks!
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AdminTypefinity (Support, Typefinity) commented
UPDATE 2: The fixes we made from our end are now out in release 1.2.3. If you are still having issues after upgrading to that, please let us know.
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AdminTypefinity (Support, Typefinity) commented
UPDATE: we found the issue. Ironically it relates to some changes Apple has made to try to improve third-party keyboard support: specifically, to allow third party keyboards to slide up more smoothly. Can't make an omelette without breaking a couple of eggs, I guess! We should have a fix out through our beta-test program in a couple of days. Please get in touch by submitting a direct request here or emailing us at support at padkeys.com if you're interested in participating. Thanks for your patience!