Love the idea of this, but PadKeys needs definite improvements. The number row is so short I'm constantly hitting letters below. Also, the spell check row is too short on height as well. So I look up and my sentence is jibberish. It would also help to have the most common suggestions in the center working outwards instead of to the left where it's harder to see and further away from where your eye naturally goes. Lastly, the delete button is funky. It needs to be a square not some "tetras shape" where I'm constantly getting a bracket symbol mixed in. This could be a wonderful app with some tweaks!
Over several recent releases, we’ve increased number row and suggestions bar height on the iPad in portrait mode. We’ve also made the edges of the screen more sensitive so that when tapping the lower part of the inverted-L backspace in US English one can aim more away from the bracket. (If it is still irritating, and you can put up with the British spelling suggestions, use the “English, UK” layout which has a rectangular backspace key.)