CircadiaOS: Sleep Temperature
Tune your bedroom for sleep
About
This app learns your body's ideal sleep temperature and automatically adjusts your smart thermostat throughout the night. It uses data from your wearable to personalize a four-phase temperature schedule for optimal sleep recovery. Requires a compatible smart thermostat and sleep-tracking wearable.
What's New in CircadiaOS
1.6.0
July 2, 2026
Performance improvements and minor refinements.
Subscription plans
CircadiaOS Lite Monthly
Automated thermostat comfort scheduling
FAQ
What smart thermostats does CircadiaOS support?
CircadiaOS supports Nest, ecobee, Honeywell, and 14 other brands through Seam integration. This allows for broad compatibility with many existing smart home setups.
What wearables can I use with CircadiaOS?
You can use wearables that track sleep, such as Apple Watch, Whoop, Oura, Garmin, or Fitbit. The app uses this data to personalize your sleep temperature schedule.
How long does the calibration period for CircadiaOS last?
CircadiaOS requires approximately two weeks for calibration. During this time, it runs a conservative schedule and observes your body's response before personalization begins.
Does CircadiaOS have ads?
No, CircadiaOS does not contain advertisements. The app is focused on providing a seamless and uninterrupted sleep optimization experience.
What is the cost of CircadiaOS?
CircadiaOS offers a 1-month free trial, after which it costs $19.99 per month or $159.99 per year. Subscriptions auto-renew unless canceled at least 24 hours prior to the end of the period.
Is CircadiaOS a medical device?
No, CircadiaOS is a sleep wellness application and is not a medical device. It does not diagnose, treat, cure, or prevent any disease or condition. Information provided is for personal informational purposes only.
How does CircadiaOS personalize temperature settings?
After calibration, CircadiaOS tests one temperature setting at a time and retains what works best for your sleep, not just the average sleeper. Morning analysis of your wearable data further refines tonight's schedule.
Can I cancel my CircadiaOS subscription at any time?
Yes, you can cancel your CircadiaOS subscription at any time through your App Store account settings. Remember to cancel at least 24 hours before the end of your current billing period to avoid auto-renewal.