The Sleep Tracker app is a very simple and easy-to-use app to track your sleep cycles. It is helpful for people who have trouble sleeping, and also for people who want to be able to track their sleep cycles. The application uses the phone's built-in microphone to record the sounds of your phone. It can also record the sounds of the phone's environment such as the clock, the wind, or the vibration of the phone.

You can also record your own voice or the sound of your own voice. The application will record the sounds, and the recordings will be stored in a database.