Connect your wearable
WHOOP · OURA · APPLE WATCH · GARMIN
Althewa listens to your sleep, heart-rate variability, and recovery, then learns your personal circadian rhythm in about a week.
The house
that knows you.
Althewa reads your body's signals and tunes your home in real time, adjusting light, air, and temperature so you sleep better, recover faster, and live longer.
Works with WHOOP · Oura · Apple Watch · Garmin
19:28 · WEDNESDAY
Your watch notices
before you do.
Recovery is low and sleep debt is up. Althewa reads the signal and quietly begins your wind-down. You haven't touched a switch, a scene, or an app.
19:47 · LIGHT
The light falls
with the sun.
Overheads fade to 2200 kelvin, the warm amber your melatonin can live with. The blinds follow the light outside, to the minute, every evening.
20:15 · AIR
The bedroom cools
half a degree.
Your core temperature has to drop before deep sleep can start. The house begins early and vents the CO₂, so the room is ready before you are.
22:00 · NIGHT
You just feel tired,
at the right time.
That's the whole trick. A thousand small adjustments a night, compounding into deeper sleep, faster recovery, and years of healthier life.
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07:00 · THE MORNING AFTER
You spend 90% of your life indoors. That room is either aging you or repairing you.
Bright, cool light at 10 p.m. tells your body it's noon. A bedroom one degree too warm quietly steals your deepest sleep. Stale air overnight drags your recovery down before tomorrow even starts.
None of this feels dramatic. It compounds, night after night, for decades. Which is exactly why the environment you sleep, work, and rest in is the biggest longevity lever most people have never touched.
Althewa exists to pull that lever automatically. Not with dashboards or routines you program, but with a home that follows your biology on its own.
- 90%of your life happens inside buildings
- −0.5°Cthe core-temperature drop your body needs to enter deep sleep
- 2200Kthe evening light temperature your circadian clock expects
SET UP IN ONE AFTERNOON
Three steps between you and a home that runs itself.
No rewiring your life. No programming scenes. You set it up once, then the house does the rest, every day.
Scan your floorplan
TWO MINUTES · ANY PHONE
Walk the rooms with your phone. Althewa maps where daylight lands, how air moves, and which zones matter most for sleep and focus.
Live in it
LIGHTING · CLIMATE · AIR QUALITY
The house re-tunes itself every few minutes around your body: brighter mornings, amber evenings, cooler cleaner nights. You just live.
THE SCAN
One floorplan in.
A home designed for longevity out.
Most smart homes automate the house you happen to have. Althewa goes further. From a single scan, it redesigns the space: which lights go where, how air should move, how each room should behave across the day.
It selects the fixtures, the HVAC setup, and the sensors for you, then hands you a plan an installer can execute. Beautiful, yes, but optimized for your circadian rhythm first, aesthetics second.
Auto-designed for longevity, not just for looks.
MEASURED, NOT PROMISED
"When the air in a bedroom slips, recovery follows. The correlation is too strong to ignore."
From a 90-night independent study of Althewa-tuned bedrooms
Scientific advisor: Prof. Michal Zeman, circadian biology, Comenius University
- 90 nights
Independent, real-home study, not a lab demo. Sleep and recovery tracked against the room's actual conditions.
- r ≈ −0.61
Measured correlation between overnight CO₂ and heart-rate variability. Cleaner air, stronger recovery.
- 24/7
Decisions run locally, in your home. Your biological data stays yours. Private by architecture.
MEMBERSHIP
One subscription. Decades of compounding.
Start with the home you already have, or let Althewa design your next one from the floorplan up.
Althewa OS
FOR THE HOME YOU HAVE
€39 / month
- Wearable-driven light, climate & air, automatic all day
- Floorplan scan and circadian zone map included
- Works with your existing smart lights & thermostat
- Local hub, so your data never leaves the house
Althewa Architecture
FOR THE HOME YOU'RE PLANNING
Per home · includes OS
- Full redesign from your floorplan scan
- Lighting plan, HVAC spec & sensor map, chosen for you
- Installer-ready documentation & coordination
- Designed for longevity first, aesthetics close behind
Founding cohort: the first 200 homes lock their founding rate for life.
22:30 · LIGHTS OUT
Live in the house that knows you.
Early access opens home by home. Join the waitlist and we'll write to you once, when it's your turn.
No spam. One email when early access opens.