Ciphio Sleep
90-Minute Sleep Cycle Calculator
Sleep Smarter, Wake Fresher. Calculate optimal bedtimes based on 90-minute sleep cycles. No fluff, just math.
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90-Minute Sleep Cycle Calculator
Sleep Smarter, Wake Fresher. Calculate optimal bedtimes based on 90-minute sleep cycles. No fluff, just math.
Calculate bedtimes for 4-6 complete sleep cycles. Wake at the end of a cycle, not in the middle of deep sleep.
Late night? Get survival options when optimal sleep is impossible. Sometimes 90 minutes is better than 4 hours.
Track 7-day sleep debt and surplus with visual charts. See your sleep patterns at a glance.
Full localization including Arabic, Japanese, Turkish, German, French, Spanish, and more.
No data collection, works completely offline. Your sleep data stays on your device only.
Retro LCD, Cyberpunk, and Miami 1984. Pick the vibe that matches your sleep style.
Ciphio Sleep uses the science of sleep cycles to help you wake up feeling refreshed. Sleep cycles last approximately 90 minutes, and waking up in the middle of a cycle leaves you groggy. Waking up at the end of a cycle? That's when you feel your best.
Simply enter when you need to wake up, and Ciphio Sleep calculates the optimal times to fall asleep. We account for the average 15 minutes it takes to fall asleep, giving you realistic bedtime targets.
Not every night goes according to plan. That's where Gremlin Mode comes in. When you're up way too late, Gremlin Mode gives you the best survival options—sometimes a short 90-minute cycle is better than 4 hours of interrupted sleep.
Your privacy matters. Ciphio Sleep stores everything locally on your device. No cloud sync, no tracking, no analytics. Just you and your sleep data. Learn more in our privacy policy.