This application is perfect! I ordered it on Amazon because I had a promotion of 3 euros on application purchases through the Shop Amazon. It's a great application and I was just looking for an application like this on my smartphone Android. This is not what is lacking on the Google Play Store for free but often lack follow comprehensive enough. But here you have everything you need for almost conscientiously analyze your sleep, with the ability to record noises, hum (an option also allows you stimulate if you snore ...) Ultra-complete application and regularly updated by its developers thus gives me satisfaction! If you find a commercial application for this kind of need, so do not hesitate, you can not be disappointed. This is one of the best application we can find for our Andophones;)