Ad supported version is basically worthless on an Android phone. It would not surprise me if that was by design though. It constantly freezes when it comes to ads. I've tried every recommendation on the HBO website to fix it, none of them have worked for me. I've uninstalled, and reinstalled the app so many times now trying to get it to work correctly, with no luck. I would not be surprised if all the glitches are intentional, to get people to upgrade.