RestLog is a free sleep tracking application designed for Android users that emphasizes privacy and user control. It allows users to log their sleep patterns by recording bedtimes, wake-up times, and sleep quality ratings, along with notes on how they feel upon waking. The app encourages users to consider various factors affecting their sleep, such as caffeine intake or stress levels, providing a comprehensive understanding of their sleep habits. With no need for an account or internet connection, all data remains securely on the user's device.

The application features a user-friendly interface with both dark and light mode options, making it suitable for nighttime use. Users can view their sleep history in an easily readable timeline and access statistics that highlight trends in sleep duration and quality. The app's design prioritizes privacy, with no ads, trackers, or data collection, ensuring users can focus solely on improving their sleep routines.