Sleep Cycle Calculator

Sleep Cycle Calculator is a simple, fast, flat-design utility. No accounts, no clutter — just the tool you need.

Features
• Wake up refreshed using 90-min cycles
• Pick a wake time -> best bedtimes
• Sleep now -> best wake times
• Highlights full-rest options

Zero everything
• No login or account needed
• No location, camera, contacts or storage permissions
• Clean Material 3 flat design
• Works fully offline