Pretty good!

Measures sleep well, soft wake up is nice and the trends screen is interesting to read. My only complaint is that it keeps changing my alarm music to the default sound. I set it to wake me up to my music since I tend to leave the alarm on and listen to my song thereby increasing my chances of making it out of bed. However when it changes the music I get frustrated and close the app or shut off the alarm. Im not sure if it does this on purpose or if its just a bug. Still, everything else is great!

sephiroth7755 about Sleep Cycle - Tracker & Sounds