CircadiaOS: Sleep Temperature
Tune your bedroom for sleep
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Tune your bedroom temperature for the night ahead. CircadiaOS sets a nightly schedule and adjusts your room automatically — no wearable required to start.
Your bedroom, tuned for sleep.
Most thermostats run one temperature all night. Your body doesn't sleep at one. CircadiaOS reads your wearable each morning, learns the temperature your body recovers best at, and schedules four-phase nightly temperatures on the smart thermostat you already own.
HOW IT WORKS
— Calibration. For your first two weeks, CircadiaOS runs a fixed conservative schedule and observes how your body responds.
— Personalization. After calibration, the system tests one temperature setting at a time and keeps what works for your sleep, not the average sleeper's.
— Morning analysis. Each morning, your wearable sends a summary of last night's sleep. CircadiaOS computes a Sleep Quality Index against your personal baseline and uses it to refine tonight's schedule.
WHAT YOU'LL NEED
— A smart thermostat: Nest, ecobee, Honeywell, and 14 other brands supported through Seam.
— A wearable that tracks sleep: Apple Watch, Whoop, Oura, Garmin, or Fitbit.
— About two weeks for calibration before personalization begins.
THE METHOD
CircadiaOS runs four temperature phases across the night — pre-sleep, early night, late night, and pre-wake — aligned with your body's natural temperature rhythm. The schedule is sent to your thermostat before bedtime. There's no real-time tracking; the system acts before sleep, not during it.
SUBSCRIPTION
— 1-month free trial, then $19.99/month or $159.99/year.
— Subscriptions auto-renew unless canceled at least 24 hours before the end of the period.
— Cancel anytime in App Store account settings.
— Payment is charged to your Apple ID account at confirmation of purchase.
PRIVACY & WELLNESS
CircadiaOS is a sleep wellness application. It is not a medical device and does not diagnose, treat, cure, or prevent any disease or condition. Information provided is for personal informational purposes only and is not a substitute for medical advice.
Privacy Policy: https://circadiaos.com/privacy
Terms of Service: https://circadiaos.com/terms
Ratings & Reviews
Performance improvements and minor refinements.
The developer, ARMANI MARLEY JOHNSON, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ARMANI MARLEY JOHNSON
- Size
- 10.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- CircadiaOS $19.99
- CircadiaOS $159.99
- CircadiaOS Lite Monthly $9.99
- CircadiaOS Lite Yearly $99.99
- Copyright
- © CircadiaOS LLC