Sleep Cycle Bedtime Calculator

Kai Oelfke · Health & Fitness

4.1 285 ratings Free

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What changed · US

Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.

Aug 26, 2026
Rating ★ 4.1 → 4.11

Price & rating history · US

Reconstructed from the listing changes AppTracker has observed in this storefront, so each line starts at the first change on record.

Average rating history over the observed period. 4.1 4.11 Aug 26 17:45 Aug 27 05:14 Aug 27 16:44 Aug 28 04:13 Aug 28 15:43

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About

Sleep smarter. Feel more refreshed. Calculate the best time to wake up or when to go to bed. It's based on sleep cycles. They're about 90 minutes each and it's good to get 5-6 cycles. Sleeping at midnight for 5 cycles? Wake up at 7:30 AM. Need to wake up at 6:00 AM, but want 6 cycles? Then hit the bed at 9:00 PM. Not falling asleep immediately? Customize your fall asleep time. PS: Most people need ~ 15 minutes to fall asleep. - Apple Watch support - Customize time to fall asleep Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

What's new · 1.0.10

Set bedtime and wake-up alarms¹² right from SleepCalc — no more switching apps. Plus: your Sleep Score, new charts, and a more reliable Apple Watch sync. New • Bedtime and wake-up alarms¹² • Sleep Score — see how restorative your night was, with 14 days of history included and your full history available with a purchase¹ • Sleep Duration chart³ • Sleep Interruptions chart³ Improved • Sleep Consistency chart is smoother and easier to read • Bedtime and wake-up times now persist between sessions • Customize the minimum and maximum number of sleep cycles to match your sleep style • Settings and time sync between Apple Watch and iPhone are more reliable Fixed • Apple Health sleep data now syncs more reliably ¹ Requires purchase ² Requires iOS 26 ³ Requires Apple Watch with sleep tracking enabled in Apple Health

Details

DeveloperKai Oelfke
ReleasedJan 2023
UpdatedApr 2026
Version1.0.10
Size22.5 MB
RequiresiOS 18.0 or later
Age rating4+
LanguagesEnglish
PriceFree
Categories Health & FitnessUtilities
Bundle IDde.kaioelfke.SleepCalc