Stop waking
at 3am.
Sleep Again predicts your early morning wake-up risk each evening — before you go to sleep. Based on your HRV, heart rate, and sleep history from Apple Health.
Download on the App Store
Inside the app
Your risk, calculated before you sleep.
You stopped thinking about it.
Your body didn't.
98. Your body finally got it right.
Deep. REM. Core. All of it, mapped.
The book explains it.
The app tracks the fix.
What the app does
Seven nights of data is enough to see your pattern. Thirty nights is enough to understand it.
01 — Reads your data
From Apple Health, on device
Connects to Apple Health. Reads HRV, resting heart rate, and sleep stage history. All processing stays on your device — nothing is sent to external servers.
02 — Finds the pattern
What precedes your bad nights
After 7 nights, the app maps what leads to early waking — elevated evening HR, low HRV the day before, alcohol, stress markers. Your pattern, not a generic one.
03 — Predicts tonight
Before you go to sleep
Each evening you get a risk score. On a high-risk night, you know in advance — and you have time to act on it before it becomes a 3am problem.
For book readers
Read the book.
Get 3 months free.
Buy Sleep Again by Joakim Achrén and unlock 3 months of the app at no extra cost.
Your book purchase confirmation includes a redemption code. Tap "Redeem a pass" on the subscription screen to activate it.
Download on the App StoreHow to redeem
Free on the App Store. iOS 17 or later.
On the subscription screen, before subscribing.
From your book purchase email. Or scan the QR code if one was included.
No payment required. Access all premium features immediately.