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 runs your thermostat on an overnight curve, then adjusts it one setting at a time from how you slept.

Download on the App Store

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Your thermostat, all night.

CircadiaOS adjusts it while you sleep.

Example starting night: asleep 11 pm, up 7 am

10:15 pmPre-sleep70°

11 pmEarly night, coolest69°

2:30 amLate night70°

5:30 amPre-wake71°

Works with Nest, ecobee, Honeywell Home and 20+ more thermostat brands. 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 days free — bedroom window with four temperature setpoints

It learns from you.

Each morning your wearable reports how you slept. CircadiaOS keeps the changes your sleep data supports and undoes the ones it doesn't.

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 Tries a cooler late night 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