Earth from space at night, city lights glowing

The world is vast. Your sleep is personal.

Every night comes down to one room, one body, one temperature. CircadiaOS tunes your thermostat to the way you actually sleep -- and learns what to change next.

Download on the App Store

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Your thermostat, all night.

CircadiaOS adjusts it while you sleep.

Last night with CircadiaOS

10 pmWinding down71°

12 amDeep sleep69°

3 amColdest point68°

5 amWarming up70°

6:30 amWake-up72°

Works with ecobee, Honeywell Home, Sensi, and 20+ more via HomeKit and SmartThings. Nothing new to buy. How the method works.

See your night. Control it.

Simple by design. No learning curve.

Build your night — temperature curve with bedtime, wake time, and bedroom settings

Sleep results — score 75, overnight temperature curve, schedule and sleep metrics

CircadiaOS home — 68°F room temperature, active adjustment, tonight's schedule

14 nights free — bedroom window with four temperature setpoints

It learns from you.

Each morning your wearable reports how you slept. Over time, CircadiaOS finds the schedule that works best for you.

Night 1–14 Runs your starting schedule Starting

Night 15–28 Tries cooling you more before bed Kept

Night 29–42 Tries a deeper drop at midnight Reverted

Night 43–56 Warms you up before your alarm Kept

Night 57+ Your schedule, shaped by your sleep Personal

Illustrative timeline. The starting period takes about 14 qualifying nights. Adjustment begins on Premium with a connected wearable.

Your wearable reads the night. We set the room.

No mattress pad. No water tank. CircadiaOS connects the thermostat you already own to the wearable you already wear.

Thermostats

Nest · ecobee · Honeywell Home · Sensi · Trane · Mysa · Aqara · Eve · Meross · Lux · Stelpro · Radio Thermostat · Sinopé · Centralite · Remotec · Alarm.com · GoControl

+ more via SmartThings and HomeKit · Check compatibility

Wearables (optional)

Apple Watch · Oura Ring · Whoop · Garmin · Fitbit

Optional for the starting schedule. Enables sleep-based adjustment on Premium.

Requirements

iPhone · iOS 18+ · United States App Store

Download on the App Store