I use Sleep as Android to wake me up when I’m in a good sleep phase for it. You put your phone on your mattress and it uses the accelerometer to guess how deeply you’re sleeping by your movements. I give it a 15 minute period where it’s allowed to wake me if I’m in light sleep, and then at the end of that it wakes me regardless. Seems to work well enough.
I use Sleep as Android to wake me up when I’m in a good sleep phase for it. You put your phone on your mattress and it uses the accelerometer to guess how deeply you’re sleeping by your movements. I give it a 15 minute period where it’s allowed to wake me if I’m in light sleep, and then at the end of that it wakes me regardless. Seems to work well enough.
I sleep without alarms anyway. But someone should find this description useful!