I have a Samsung phone and the app does not work when it goes to sleep. I already turned off all the battery saving/optimizing in the settings, but it still pauses when the screen goes to sleep. My other *free* meditation apps work with the phone screen asleep. So you'd think that they'd fix this issue for paying customers. There's no other answer on their website other than fixing the battery optimization on your phone, which clearly does not work. I will change my rating once they fix it.