Stale air and chemical fumes build up in closed rooms without a smell or a sign. Layla tracks both, scores every room, and tells you when to let fresh air in.
What Layla noticed | bedroom
The bedroom filled from 17:00 and did not clear until the door opened at 07:00.
→ Open the bedroom door or window before sleeping.
This is one of those products that tries to do everything—air quality, motion, noise, temperature—and for the most part, it delivers.
Amazon ReviewWhen I realized that the sensor itself is 9 in one, I decided to give it a try. It helps me know how my family is doing while I'm at work.
Amazon ReviewI'm really impressed with this sensor. Setup was quick and straightforward, and the app is very user friendly. I love checking everything in one plac…
Amazon ReviewThis combines multiple smart home functions into one device, from noise and motion to air quality and temperature monitoring.
Amazon ReviewI received the Layla smart home agent mainly for my friends' short-term rental, and it's been a game-changer. Setup took literally minutes.
Amazon ReviewI like this more than I expected because it actually gives me useful room info at a glance. The readings feel consistent and the connection has staye…
Amazon Review90%
of our time is spent indoors, where some pollutants run well above outdoor levels.1
US EPA
2–5x
higher indoors than outdoors: about a dozen common household chemicals, with far bigger spikes while painting or cleaning.2
US EPA, TEAM study
~2,400
ppm: average overnight CO₂ in closed bedrooms in a Danish field study, against about 425 ppm outdoors.3,4
Technical University of Denmark, 2016 · NOAA, 2026
1 In 3
cooking sessions have the range hood switched on. People air a room when they notice a problem, and mostly they don't notice.5
Berkeley Lab, 2020
Tap a score to see the research behind it and what Layla shows you.
Research From:
Research From:
The strongest case for measuring your air is what happens next.14
> 95%>95%
of homes in a two-week study lowered their typical CO₂ in the week residents could see a live reading, simply by airing rooms more.
Classrooms with a visible CO₂ indicator opened more windows and cut CO₂
Schools with a CO₂ warning device ventilated better than with advice alone
Real-time air alerts at home changed behaviour in a randomized trial
Healthy-building experts recommend monitoring ventilation in real time
That's why every Layla card ends with one thing to do. A clear reading, a simple action, and a score that shows the result the next morning.
That's why every Layla card ends with one thing to do. A clear reading, a simple action, and a score that shows the result the next morning.
Layla scores how long the air stayed stale, not its single worst moment, across the 24 hours to 07:00. Bands follow the EN 16798-1 indoor standard.7
Air: hours in each stale-air band, every room, plus a VOC term.
Focus & Work: the average across your working hours: Sharp, Slipping or Heavy.
Sleep: the same air measure, narrowed to your bedroom overnight.
One tap deeper: every card in the app shows its rule and the standard behind it under "How this is measured".
One of these incidents costs what Layla costs forever. Layla prevents it.
Next morning
Air 59, Needs attention. Six hours above the top band.
What Layla noticed
The bedroom filled from 17:00 and did not clear until the door opened at 07:00.
What to do
Open the bedroom door or window before sleeping.
A four-step routine, built on how the studies measured and improved indoor air.
1
Place it where you breathe
In the room you use most, at about head height, away from open windows and vents.
2
Pin the cards that matter
Pin Air, Focus & Work and Sleep to your home screen, so one glance each morning covers the lot.
3
Do the one thing
Each card ends with a single action: open a window, prop a door, run the extractor.
4
Compare the week
The 7-day view shows whether a new habit held, room by room.
Layla counts how many hours each room spent above 1,000, 1,400 and 2,000 ppm of CO2 over the 24 hours to 7am, using the EN 16798-1 bands, and takes a few more points off for sustained VOCs. Long stuffy stretches cost more than brief peaks.
Keep rooms under 1,000 ppm for most of the day, and closer to 800 if you can. The bedroom overnight is the biggest win: fresher air there is linked to deeper sleep, and Layla's Sleep score tracks how long your bedroom stays stale.
Place Layla in the room you use most, at about head height, away from open windows and vents. Ventilation guidance puts CO2 monitors at breathing height, in the rooms people actually spend time in.
Yes. Each sensor covers one room. Flag the rooms that matter and Layla lines them up each morning, so you can see which one is slipping and track the week room by room.
No. You own Layla once, with no monthly fee. The Air score and everything on your plan stay unlocked for good. A single bad-air problem can cost more to fix than Layla does.
Yes. Layla reads air signals, CO2, VOCs and humidity, not people. No cameras, no audio, no footage stored. Encrypted and built for privacy.
A wall outlet and Wi-Fi. Set it up in the Layla app, place it where you breathe, and it starts scoring hours of stale air automatically. No hub, no extra hardware.
One device, one-time price.
All-in-One
Everything in Smoke & Air Quality, plus the full Sleep Score, noise, presence and AC control.
View All-in-One
Best Value
Smoke & Air Quality
Air score, CO2, VOCs, humidity, mold risk and smoke detection.
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30-day money back · 2-year warranty30-day money back
2-year warranty
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One device in the room, an Air score by morning, and the research behind every number.
