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uHoo Guard · Health Intelligence

Your air.Fully understood.

Guard reads the signals in your air that you cannot see or smell.Mold conditions building in the walls. Virus risk rising before flu season hits.Pollen sneaking through the windows. It turns all of it into plain,actionable intelligence so you can stay on top of your game.

Get Caeli — $249 → Four health indices ↓
Already have Caeli? Add Guard from your dashboard.
Clean, focused professional workspace with natural light
Home office · Guard active
92 Excellent
Virus IndexLow risk
Mold IndexNone detected
Pollen IndexOptimal
InfluenzaSeasonal alert
Guard watching all 4 health indices
What Guard does

Know your home. Own your health.

Guard adds a full health intelligence layer on top of Caeli. Six indices, advanced analytics.Weekly and monthly comparisons, date comparison, and a web dashboard.All in the app you already use.

Mold Index icon
Mold Index
Daily growth risk score based on your actual humidity, temperature, and airflow. Know before it becomes visible.
Virus Index icon
Virus Index
Airborne virus survival and transmission risk in each room, scored daily from your actual conditions.
Influenza Index icon
Influenza Index
Tracks the indoor conditions that accelerate flu spread between people sharing the same space.
Pollen Index icon
Pollen Index
Indoor allergen exposure based on your actual home, not an outdoor weather forecast.
Discomfort Index icon
Discomfort Index
How the combination of temperature and humidity actually feels to the people in the room. Scored 1 to 10.
Air Quality Index icon
Air Quality Index (AQI)
A single daily score that combines all parameters into one clear picture of your home's overall air quality.
Hourly trend charts icon
Hourly trend charts
Every index plotted hour by hour. Today vs yesterday on the same chart so you can spot what changed and when.
Weekly comparison icon
Weekly comparison
This week vs last week, colour-coded by day. See at a glance which days your air was good and which were not.
Monthly calendar view icon
Monthly calendar view
A full calendar of your air quality history. Spot patterns across the month and identify consistently bad days.
Time-of-day patterns icon
Time-of-day patterns
For every parameter, Guard surfaces when it is usually highest and lowest. Patterns you would never spot on your own.
Room comparison icon
Room comparison
Every room with a Caeli, side by side. AQI, index scores, temperature, and humidity all in one view.
Date comparison icon
Date comparison
Pick any two dates and compare any of the 9 parameters side by side. Spot what was different on your best day vs your worst.
Inside the app

What advanced analytics actually looks like.

Every index comes with hourly trend charts, today vs yesterday, and a plain-language summary of when your air is usually at its best and worst.

Virus Index
Hourly trend · today vs yesterday
Today
5/10 MILD
Yesterday
6/10 MILD
036912151821
Weekly Comparison
Air quality changes during the week
THIS WEEK
T
F
S
S
M
T
W
LAST WEEK
T
F
S
S
M
T
W
Air Quality Trends
When your air is best and worst
Carbon Dioxide icon
Carbon Dioxide
Usually highest at 12am · lowest at 2pm
▲ 1,223 ppm
▼ 419 ppm
Humidity icon
Humidity
Usually highest at 11am · lowest at 12am
▲ 100%
▼ 64.6%
Temperature icon
Temperature
Usually highest at 3pm · lowest at 6am
▲ 29.4°C
▼ 17.3°C
Room Comparison
All your Caeli devices, one view
uHoo Caeli 01
13 AQI 7/10 DISCOMFORT 6/10 VIRUS 6/10 MOLD
Temperature icon28.3°CHumidity icon87.1%
Bedroom
4/10 VIRUS
Humidity icon100.0%
Proprietary health intelligence

Your air speaks. Guard translates.

Four indices no other home monitor has. Each updated daily from your live Caeli readings, local environmental data, and health risk models.

Index 1 of 4
Mold Index
Mold grows in the dark. Now you can see it coming.

Humidity, temperature, and ventilation together determine how fast mold can grow on your surfaces. The Mold Index tracks the combination, not just a single number, and alerts you before spores become visible.

1 to 3 · Low 4 to 6 · Moderate 7 to 8 · High 9 to 10 · Severe
Read the science →
Index 2 of 4
Virus Index
Some rooms spread viruses better than others.

Low humidity, poor ventilation, and certain temperature bands create the conditions where respiratory viruses persist in the air longest. The Virus Index scores your home's transmission risk daily.

1 to 3 · Low 4 to 6 · Moderate 7 to 8 · High 9 to 10 · Severe
Read the science →
Index 3 of 4
Influenza Index
Flu season is not just outside. It lives in your air.

Built on 9 Caeli parameters and a framework of published science on flu transmission. Tracks the specific conditions that accelerate flu spread between people sharing the same indoor space.

Good · 1 to 3 Mild · 4 to 6 Bad · 7 to 8 Severe · 9 to 10
Read the science →
Index 4 of 4
Pollen Index
Pollen season does not end at your front door.

Indoor pollen can reach 80 percent of outdoor levels and resuspends every time someone walks through a room. The Pollen Index tracks particulates, humidity, and ventilation to show your real exposure.

1 to 3 · Low 4 to 6 · Moderate 7 to 8 · High 9 to 10 · Severe
Read the science →
Who Guard is built for

Your air is either working for your familyor working against them.

Child at home looking healthy and energetic
For families
Know before they start sneezing.
Guard flags rising mold, virus, and pollen risk before anyone shows symptoms. Children breathe faster than adults and absorb more of whatever is in the air. You get the heads up in time to actually do something about it.
Focused professional working on laptop in a clean home office
For high performers
Your air is your competitive edge.
CO₂ creep silently drains your focus long before you notice it. Guard's trending data shows you precisely when your air starts costing you performance, so you can correct it before you lose the afternoon.
Person sleeping peacefully in a well-kept bedroom
For better mornings
Good mornings are built the night before.
Guard tracks your overnight air so you understand what made a great night's sleep. Temperature, humidity, CO₂, all logged. Then you can recreate it consistently, not just hope for it.
Date comparison

Your air remembers everything.Now you can too.

You slept eight hours and still woke up foggy. Your workout felt harder than last week.You were sharp on Tuesday but sluggish on Thursday. The answer is almost always in your air.Guard lets you pick any parameter, any two dates, and see exactly what was different.

💤 Why did I sleep so badly last night? 🧠 Why am I foggy this morning? ⚡ What was different on my best day this week?
Sensor ▾
Masters Bedroom ▾
Carbon Dioxide ▾
Hour Day
9 Aug 2026 ▾
10 Aug 2026 ▾
1,170982794606418
03691215182124
What this tells you Both nights, CO₂ climbed past 1,000 ppm while the room was occupied. On 9 August it peaked higher and earlier - those are the hours your sleep quality takes a measurable hit. The midday trough shows the room airing out naturally. The evening spike shows it building again before bed. If you woke up foggy either morning, now you know why.
Tailored to your household

Tell Guard who lives here.It adjusts accordingly.

Set your household profile and every threshold, alert, and index recalibrates around the people who actually live in your home.

Has kids icon
Has kids
Tighter thresholds for mold and humidity. Earlier alerts for conditions that affect children more than adults.
Has a pet icon
Has a pet
Adjusts for higher dander and particulate levels and flags conditions that affect animals differently.
Has asthma icon
Has asthma
Flags pollen, humidity, and particulate conditions at lower thresholds and surfaces the risk earlier.
Elderly household icon
Elderly household
Recalibrates CO, CO₂, and temperature thresholds to reflect the different risk profile of older residents.
What you get

What comes with Guard.

Guard does not replace what Caeli already monitors. It adds health intelligenceon top of the same live data, calculated daily from your actual readings.

uHoo Caeli · Always on
Core monitoring
✓9 parameters, live every minute
✓Instant alerts with action steps
✓Full air quality history
✓Family sharing and app access
Guard · $79 / year
Health intelligence
+Mold, Virus, Influenza, Pollen indices
+Discomfort Index · heat and humidity combined
+Air Quality Index (AQI)
+Room comparison dashboard
+Hourly trends · weekly and monthly views
+Time-of-day pattern summaries
+Household profiles: kids, pets, asthma, elderly
Full comparison

Every feature, side by side.

See exactly what is included in the device, each add-on, and Stacked.

Caeli $249 · device only Command $59/yr · automation Guard $79/yr · health intelligence Stacked $99/yr · save $39
Capabilities Basic$0 + Command$59 / year + Guard$79 / year + Stacked$99 / year
Live air quality dataMinute by minute✓✓✓✓
Instant alerts✓✓✓✓
Air quality charts / history✓✓✓✓
Share data with family / friends✓✓✓✓
Smart Home IntegrationApple, Google, Alexa, SmartThings, Home Assistant-✓-✓
Automation-✓-✓
Room comparison--✓✓
Advanced analytics--✓✓
Overlay air charts to identify correlations--✓✓
Weekly and monthly views--✓✓
Time-of-day patterns--✓✓
Smarter alerts based on health profile--✓✓
Access to web dashboard--✓✓
Household profiles--✓✓
Discomfort Index--✓✓
Air Quality Index (AQI)--✓✓
Mold Index--✓✓
Virus Index--✓✓
Influenza Index--✓✓
Pollen Index--✓✓
Each additional Caeli is $249. Add-ons are priced per device: Command $59/year, Guard $79/year, or both with Stacked at $99/year per device.
Want both? · Stacked
Everything Command Does.Everything Guard Knows.
Smart home automation and health indices in one subscription.Command is $59/year. Guard is $79/year. Together as Stacked they are $99/year.You get both, you save $39, and the first 3 months are free when you buy uHoo Caeli.
$99per year · save $39
Get Stacked
Common questions

Answers before you decide.

Caeli alone gives you the full picture of what is in your air right now: nine parameters, live readings, instant alerts, and your complete history. That is already more than most people have ever had. Guard goes further. It takes everything Caeli measures and turns it into health intelligence: six daily indices that score your air for mold, virus, influenza, pollen, discomfort, and overall air quality, hourly trend charts, weekly and monthly comparisons, date comparison across any parameter, time-of-day pattern summaries, room comparison across all your devices, household profiles calibrated to who lives in your home, and a web dashboard. Caeli tells you what is in your air. Guard tells you what it means, tracks how it changes, and helps you act on it.
The Mold, Virus, Influenza, and Pollen indices are proprietary risk scores updated daily using your Caeli sensor readings, local environmental data, and health risk models. Instead of showing a raw number, they surface a plain-language risk level. So you always know what to do, not just what the data says.
Yes. Guard is an add-on for uHoo Caeli. The device does the sensing. Guard applies the intelligence layer on top. When you buy Caeli, both Command and Guard are free for your first 3 months so you can try everything before deciding what to keep.
When you buy Caeli, both Command and Guard activate automatically for 3 months at no charge. You get the full versions of both, not a limited preview. Before month 3 ends, we send you a reminder. Keep Command at $59/year, Guard at $79/year, both with Stacked at $99/year, or do nothing and they turn off. No charge either way.
Your data belongs to you. Everything Caeli measures is encrypted end-to-end and never sold or shared with any third party.
Yes. If you already own a Caeli, you can add Guard at any time from your account here. No new hardware needed.
Warm, inviting modern home with natural light streaming in

Be on topof your game.

Your air is either working for you or working against you every single day.Guard puts you in the picture. Then puts you in control.

Get Caeli — $249 → Also see Command →
Already have Caeli? Add Guard from your dashboard.
uHoo Guard · Health Intelligence Caeli $249 · Command and Guard free for your first 3 months
Get Caeli — $249 →