Good and clear but with glitches
Very good melody for waking, fast and clear alarm setting (analog clock like) with a line depicting planned sleep period. But: It is not easy to set time precisely (small finger movements change the setting by 5-15 minutes even on quite big screen). The app occasionally freezes or restarts while in snooze, which causes to lose the data from the current sleep. The app was not updated for three years, so it is probably not maintained anymore.