Good and simple, but should work with screen locked
This is a beautiful and simple app, and I would like to use it for all my unguided meditations, but when the screen locks, the timer resets. I believe the app prevents the screen for locking, but a more elegant and useful solution, that doesn't drain the battery, would be for the app to just keep going when the screen locks, like the meditation timer in the Waking Up app. Otherwise it's the perfect meditation app. It has 4 bells and whistles, and that's more than enough for me.