Used to be a great app. I used it daily for hours while I worked and never had problems. It started stopping suddenly and would not start up again unless I killed the app and began again. Even then it would only last a few more minutes before freezing up again. Restarting my phone fixed the issue in the past, but for the last 2 months I have had this problem repeatedly and nothing works to resolve it. I've given up. I'm canceling my membership until it's fixed.