Sleep Calculator - SleepCal

Tired of waking up exhausted?

It's not about sleeping longer—it's about waking up at the RIGHT time.

Your brain cycles through 90-minute sleep stages. Wake up mid-cycle, and you'll feel groggy. Wake at the end of a cycle, and you'll feel refreshed. SleepCal calculates the perfect time for you.


HOW IT WORKS
【WAKE UP MODE】
Tell us when you need to wake up. We'll show you the 3 best times to fall asleep—each aligned with a complete sleep cycle.

【SLEEP NOW MODE】
Going to bed now? We'll calculate the ideal wake times so you rise naturally refreshed.

【POWER NAP】
Need a quick recharge? Our smart nap timer helps you rest without oversleeping or ruining your night.


FEATURES
• Sleep Cycle Calculator based on 90-minute science
• 40+ nature sounds & white noise for faster sleep
• Custom alarm sounds—import your own music (Pro)
• Reliable wake-up with Time-Sensitive Notifications
• Apple Watch support for silent alarms
• Minimalist dark UI—easy on your eyes at night
• Privacy-first: all data stays on your device


WHY SLEEEPCAL?
We don't track your sleep. We don't need sensors.
Just pure, science-based calculation to help you wake up feeling human again.

Download now. Wake up better tomorrow.


ABOUT SUBSCRIPTIONS
SleepCal Premium unlocks custom alarms, exclusive sounds, and cloud sync.
• Monthly: $4.99/month
• Yearly: $19.99/year (Save 67%)

Payment charged to iTunes Account. Auto-renews unless canceled 24h before period ends. Manage in Account Settings.
Privacy: https://aipromptant.com/sleepcal/privacy-policy
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula