Helps me keep track when I fall asleep

This alarm not only helps me keep track of when I fall asleep and when I wake up, but also enable me to figure out when my roommate wakes up. Now I can adjust when I go to bed so I wont be at the end of a sleeping cycle (light sleep period) and unintentionally wake up when she gets off bed and makes noise.

小さい猫 about Sleep Cycle - Tracker & Sounds, v5.2.1