Dont even try to use it on Chromecast
This app is so frustrating to use. It works fine if youre streaming off of your iPad, but is definitely not user friendly or enjoyable to use if casting to your television. Navigation through video is poor at best and it typically tastes an hour and a half or longer to watch an hour long show because the streaming is awful (Netflix, Amazon prime, Hulu all work fine) I am canceling my subscription but pray it works better by the time game of thrones comes back.
Michael Wilbon about HBO Max: Stream TV & Movies, v1.8.0