I am extremely impressed with this app. I am not very good at keeping logs for my health like counting calories and logging food. Apps help me get a bit more motivated to log these types of things and also make it easier for me. Still though I am horrible at keeping up with it. Believe it or not I use this app every night. I had already listened to white noise before and it has it built In to the sleep recorder and shuts off automatically so it doesnt waste your battery!! This app is extremely easy to use and is great for a person who is trying to figure out how much sleep they are actually getting. Motionx even tells you your resting heart rate, step count, and also has an alarm built into the sleep recorder! Sleep is extremely important and with my insomnia issues this really helped me realize why I was feeling so exhausted. It now has be on a proper sleeping schedule!! I still use it every night to keep track of how I am doing and watching for any changes (it logs all your sleeps and displays it day by day or on graphs to show discrepancies) you may be going through! Great app and I recommend it to anyone. Have not had a single malfunction on the app so far and I have had it for quite some time !