Peaks: Sleep & Energy vs Yawn: Sleep Sounds, Audiobooks Utilisation & Stats
That afternoon crash isn't random: it's your rhythm.
Peaks analyzes your sleep to predict exactly when you'll focus, fade, and recover, so you stop fighting your body and start working with it. No manual tracking required, if you already track sleep, you're ready.
WHY PEAKS WORKS
Most sleep apps show you what happened. Peaks shows you what to do about it.
Your energy rises and falls in predictable waves driven by two systems: your circadian rhythm (your 24-hour internal clock) and sleep pressure (how long you've been awake). Peaks models both using the two-process model of sleep regulation, the same science behind NASA's astronaut protocols.
The result: a personalized energy curve that updates every morning based on your actual sleep.
WHAT PEAKS TRACKS
Energy Peaks – See exactly when focus is highest. Schedule deep work and important tasks during these windows.
Energy Dips – Know when crashes are coming before they hit. Plan breaks and lighter tasks accordingly.
Sleep Timing – Track when your body releases melatonin so you know when to dim lights and wind down.
Sleep Debt – Every missed hour accumulates. See your running total and how it clears over time.
Recovery Score – HRV and heart rate analysis shows how ready you are for today. Updated every morning.
Vitals – Watch for unusual heart rate patterns that might indicate your body is fighting something off.
Sleep Score – Five components of sleep quality: duration, timing, efficiency, consistency, and debt impact.
BUILT FOR YOUR WORKFLOW
Widgets for Home Screen, Lock Screen, and StandBy, your rhythm at a glance
Apple Watch app with complications for energy predictions
Calendar export overlays peaks and dips on your schedule
Shortcuts integration for custom automations
Smart notifications for peaks, dips, and wind-down timing
CONNECTS TO YOUR DATA
Works with Apple Watch, Apple HealthKit, Oura Ring, and Garmin. No manual logging, if your sleep is tracked, Peaks uses it automatically.
YOUR DATA STAYS YOURS
All calculations happen on-device. No accounts, no servers, no third parties. Your health data never leaves your iPhone.
Join 100,000+ people planning around their biology.
~ Flo & Clemens from Vienna
Peaks is a wellness tool, not intended for medical diagnosis or treatment.
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INTRODUCING YAWN!
Your ultimate sleep companion is now available on the Apple App Store! Dive into a world of restful nights and rejuvenating sleep with our sleep stories, calming music, audiobooks and so much more. Embrace us as a positive shift in your nightly routine. Yawn is more than just another sleep app; it's your gateway to a night of tranquility and relaxation. Whether you're a sleep enthusiast or someone in need of a peaceful night's rest, Yawn has something for you!
Make tonight the start of something special, and experience the serenity of Yawn. Download the app now and embark on your journey to a more rested and refreshed you!
HUGE LIBRARY OF SLEEP CONTENT
• Access our huge library of sleep audio content to help you fall asleep quicker, sleep more soundly, and develop healthy sleep habits that help you sleep easier and wake up feeling more refreshed.
LISTEN TO FULL-LENGTH AUDIOBOOKS TO HELP YOU SLEEP
• Listen to audiobooks like "Alice's Adventures in Wonderland", "The Wonderful Wizard of Oz" or "Tarzan and the Lost Empire"
MORE THAN 100 SLEEP SOUNDS & CALMING MUSIC:
• Green noise
• Brown noise
• White noise
• Nature sounds
• Rain sounds
• Wind sounds
• Water sounds
• Calming music
Sleep apps are recommended by top psychologists, therapists and mental health experts around the world. Proven to improve your sleep health.
SUBSCRIPTION INFORMATION
Yawn offers an auto-renewing subscription to provide you with unlimited access to the entire Yawn Library while you maintain an active subscription.
• Payment will be charged to iTunes Account at confirmation of purchase
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period
• Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal
• Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
• Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable
For more information please visit the links
https://support.apple.com/en-us/HT202039
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Yawn is not a substitute for medical advice, diagnosis or treatment.
- Apple App Store
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- Santé & Fitness
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Peaks: Sleep & Energy VS. 
Yawn: Sleep Sounds, Audiobooksfévrier 21, 2026