What about Caps lock?
It’s there (though maybe needs documenting). Double-tap the shift key to activate caps-lock, tap again to deactivate.
AdminPadKeys (Support, PadKeys) commented
The dark lock icon in dark keyboard mode is a bug. We will fix it.
As for the timing, after some experimentation here, it seems the system keyboard (on iOS 8 at least) has the same timing as PadKeys. In fact that's probably where we got it from. SwiftKey lets you be a bit slower, but both it and Swype have a bug where if you type shift, then a letter, then shift again quickly, it puts you into caps lock. We will have to examine how easy it would be to increase the timing while avoiding this problem.
Stephen F Ferguson commented
I am still having trouble with caps lock. It is as if I can't double tap the shift key fast
enough. The little lock picture doesn't come on. If I do get it the lock picture comes
on and caps lock works fine. Also I am using the dark keyboard layout and the
lock picture is hard to see. It would be better if the lock picture was white like the
I like the keyboard. The only problem I have with it is the double tap of the shift
key. I have been using the swiftkey keyboard and the apple standard keyboard.
Both of them work fine with caps lock. I think it is a timing problem for me with the
PadKeys keyboard. Maybe it could be addressed with a update?