Did not work
I downloaded and installed the app, added it to the Keyboard list, but could not get it to work at all. I would think that Apple would thoroughly test all apps before posting them in the store! While searching for clues as to why it did not work, I read in the product info, that the app could be used to send all keystrokes from all apps to the developer! So, I quickly deleted the app. Why would Apple produce a product with a keyboard that did not fill the screen in the first place? I have an iPhone 6S, and when held in landscape position the keyboard does not fill the whole screen - there is 1/2” of dead space on each side. E Miller