Apple app what?

See:

https://www.chess.com/forum/view/general/stuck-on-loading-screen?page=2 erik's post 25:

This is a crazy issue, but here is the explanation:

The reason that some iOS devices are unable to connect to live chess games is because of a limit in 32bit devices which cannot handle gameIDs above 2,147,483,647. So, literally, once we hit more than 2 billion games, older iOS devices fail to interpret that number! This was obviously an unforeseen bug that was nearly impossible to anticipate and we apologize for the frustration. We are currently working on a fix and should have it resolved within 48 hours.

Thanks!

That update has been in the pipeline for a few days already before this bug was widespread. It is unlikely the fix is in it.

https://www.chess.com/blog/News/chess-com-dev-update-june-9-2017

This should be fixed with the recent update 3.6.14. If you are still having issues, you can PM me. Thank you for your patience! :)