Sleep Cycle

Ever wake up feeling exhausted even after 8 hours of sleep? The problem might be your sleep cycles.

I built Sleep Cycle because I was tired of waking up groggy. I learned that sleep works in 90-minute cycles, and waking up at the right time makes all the difference. So I created an app to help me find the perfect wake time.

WHAT YOU GET:

Sleep Cycle Calculator
Enter when you want to sleep and when you need to wake up. Sleep Cycle calculates your sleep duration and shows you the best times to wake up based on 90-minute sleep cycles. Wake up at the end of a cycle and you'll feel refreshed instead of exhausted.

How It Works
Your sleep happens in cycles. Each cycle is about 90 minutes. If you wake up in the middle of a cycle, you'll feel groggy. But if you wake up at the end of a cycle, you'll feel great. Sleep Cycle finds those perfect wake times for you.

Simple & Offline
No internet needed. No complicated setup. Just pick your bedtime and wake time, and Sleep Cycle does the math. Everything happens on your phone, instantly.

Actually Private
I don't collect your data. I don't track your sleep. There are no ads. You don't need an account. Your sleep data stays on your phone where it belongs.

Beautiful Design
Dark theme with gold accents. Clean, simple interface. Everything is easy to understand. No confusing menus or hidden features.

PERFECT FOR:

- Anyone who wants to wake up feeling refreshed
- People struggling with sleep quality
- Shift workers planning their sleep
- Anyone curious about sleep science
- Parents helping kids sleep better

WHY THIS MATTERS:

Sleep quality matters more than sleep quantity. You can sleep 8 hours and still feel tired if you wake up in the middle of a sleep cycle. Sleep Cycle helps you wake up at the right time so you actually feel rested.

The 90-minute cycle is based on sleep science. Your body naturally goes through these cycles. By waking up at the end of a cycle instead of the middle, you'll feel more alert and energized.

NO PERMISSIONS. NO TRACKING. NO ADS.

Sleep Cycle is completely offline. We don't collect your data. We don't track your sleep. We don't show ads. Your sleep information is yours alone.

Try it tonight. Pick your bedtime and wake time. See how much better you feel when you wake up at the right time.

Download Sleep Cycle now and start sleeping better! 😴