Sleep Cycle is a free Android application developed by Robert Blackwell, categorized under Lifestyle and Health & Fitness. As the name suggests, the app helps users manage their sleep cycles and wake up feeling well-rested. The app is based on scientific studies that show that the human brain sleeps in cycles of approximately 90 minutes, with the end of each cycle being the best time to wake up.

Sleep Cycle offers three different modes to help users optimize their sleep:

The Fixed Wake-up mode allows users to set their desired wake-up time and suggests the optimal times to go to sleep based on their selection. The Fixed Bedtime mode is similar but allows users to specify the time they plan to go to bed, listing the best times to wake up. Finally, the Sleep Now mode is for when users feel tired and want to go to bed immediately. It displays the best times to set their alarm clock to, based on the device's current time.

All three modes can automatically configure the Android alarm clock to the selected time, making it easy for users to follow their sleep schedule. Sleep Cycle is a simple and effective tool to help users improve their sleep quality and wake up feeling refreshed.