Dakota Tech · Health & Fitness
Sleep smarter.
Wake refreshed.
Sleep science, no subscription.
ProSleep calculates your ideal bedtimes and wake times using 90-minute ultradian sleep cycles — so you wake between cycles, not in the middle of one.
Free to download (Coming Soon)
The Science
Wake at the right moment.
Human sleep moves through 90-minute cycles of light, deep, and REM sleep. Most alarms cut through deep sleep and leave you exhausted. ProSleep times your wake-up to the natural end of a cycle — when your body is already close to the surface.
Choose your mode
Enter when you want to wake up, or when you plan to go to sleep. Both directions give you the same precise results.
Pick your cycles
Select 4, 5, or 6 complete 90-minute cycles. ProSleep highlights 5 cycles (7.5 h) as the science-backed sweet spot.
Set and sleep
Adjust the onset slider for how long you take to fall asleep. Wake refreshed at the natural end of a cycle.
Two Calculator Modes
- "I want to wake up at…" — enter your wake time, get ideal bedtimes for 4, 5, or 6 cycles
- "I'm going to sleep at…" — enter your bedtime, see the best alarm times
- Times update live as you adjust any input
Three Cycle Options
- 4 cycles — 6 hours of sleep
- 5 cycles — 7.5 hours (highlighted as the science-backed sweet spot)
- 6 cycles — 9 hours of sleep
- Recommended badge clearly marks the optimal choice
Sleep Onset Adjustment
- Slider from 5 to 45 minutes to match how long you personally take to fall asleep
- Accounts for the gap between lying down and actually drifting off
- Makes your calculated times accurate to your body, not just the math
No Account. No Subscription.
- No account creation required — ever
- No personal data collected or transmitted
- Preferences stored only on your device
- No background network requests, no tracking
Set System Alarm — Premium
- Set a system alarm directly from the app — no copying times by hand
- Works with your device's built-in Clock app
- One payment, no subscription, no expiry
- More premium features on the way
Dark, Calm Interface
- Dark UI designed to be easy on the eyes at night
- Minimal, distraction-free layout — no ads, no nags
- Available on iOS and Android
Simple Pricing
- Full sleep cycle calculator
- Both calculator modes (wake-at & sleep-at)
- All three cycle options (4, 5, 6 cycles)
- Sleep onset slider (5–45 min)
- Everything in Free
- Set system alarms directly from the app
- Works with your device's built-in Clock app
- More premium features coming
- No subscription. No expiry. Ever.
Technical Specifications
- Framework
- Flutter (Dart) — cross-platform mobile development
- Platforms
- iOS · Android
- Minimum iOS
- 12.0
- Minimum Android
- API 21 (Android 5.0 Lollipop)
- Permissions (Android)
- SET_ALARM only
- Permissions (iOS)
- None
- Analytics
- None
- Data Collected
- None
- In-App Purchase
- net.dakotatech.prosleep.premium
- Bundle ID
- net.dakotatech.prosleep
- Version
- 1.0.0
Privacy by Design
ProSleep doesn't need your data to work. There's no account, no analytics, no server. Everything runs locally on your device. The only thing ProSleep stores is your preferred onset time — and that never leaves your phone.
The Premium in-app purchase is processed by Apple or Google. Dakota Tech never sees or touches your payment details.
Questions or feedback? Reach us at contact@dakotatech.net