← All apps · Fitness & Health

Sleep Calculator

Sleep Calculator is a smart sleep cycle assistant that helps you wake up feeling refreshed by calculating optimal bedtimes and wake-up times based on natural 90-minute sleep cycles. The app features two modes: Bedtime Mode: Choose when you want to wake up, and it calculates when you should go to bed. Wake-up Mode: Press “I want to sleep now” and it tells you the best wake-up times after 3–6 sleep cycles. The calculation logic includes a 15-minute fall-asleep buffer and displays multiple time options with cycle count and total sleep duration. ✨ Key Features: Modern, mobile-friendly UI with Tailwind CSS. Animated result cards with cycle info. One-click copy to clipboard for selected times with toast notification. Automatic saving of last selected wake-up time in localStorage. Elegant dark gradient background with polished scrollbars. Everything runs 100% client-side, no external API keys needed.

Install Sleep Calculator at its install page.

Category: Fitness & Health