There are a lot of forum posts mentioning the Chessnut Air.
https://www.chess.com/forum/search?keyword=Chessnut+Air
I only saw one which mentioned restrictions:
https://www.chess.com/forum/view/help-support/chessnut-air-compatible-now-with-chess-com
i saw references to this thread:
I can't use Chessconnect since I am playing on an iPad.
I went through a bunch of those and the best I can get is maybe they fixed it.
Guess I'll just do it and see what happens.
Can you not use Google Chrome on the iPad ? JRF2k if not need to down load chessnuts app . mind you still need to do this then via the app , log in into chess.com etc , It's very easy 
But you can not beat the Chessconnect app as it's the best for chessnut stuff / make life very easy for eboards .
Doesn't look like there is a way to get extensions via Chrome on Ipad due to Apple's security measures it has in place, @lighthouse.
I did manage to get it connected to Chess.com and Lichess.org, so I guess everything is fine.
Well at best you got the app working JRF2k When it comes to chess app on mac it seem to fall short still after all these years ? Chessconnect works well on my macbook air , The pains & joys of using Apple Mac
I am getting ready to restart my chess journey and while looking up how to get everything connected I ran into some people who said they had account restrictions placed on their account when they used the Air to play. Is that still a thing?