CircadiaOSEverything you need. Nothing you don't.
A dark, quiet interface built around one question: what should the room be doing tonight, and why.
Tonight's schedule at a glance
Your four-phase temperature curve, thermostat connection status, and last night's sleep score — all on one screen. On Premium, see which phase is being adjusted and how many nights into the current change you are.
See exactly how you slept
Tap any night to see that evening's schedule, the temperature curve, and your sleep metrics — total sleep, resting heart rate, HRV, REM, and deep sleep. Every number tied to the room that night.
Your nights on a calendar
Sleep scores color-coded by quality. Tap any day to open that night's detail. See patterns across weeks and months at a glance.
Five minutes to connect
Set your bedtime, wake time, and bedroom system. Connect your thermostat. CircadiaOS builds your first schedule and starts running it that night.
Requirements
- Device
- iPhone running iOS 18 or later
- Region
- United States App Store
- Size
- About 20 MB
- Sign-in
- Apple, Google or email sign-in
Set it up once. It runs every night.
About five minutes to connect. Free to start.