Getting started
Download the uHoo app, log in or create a free account, and follow the on-screen instructions to connect your device. For a full walkthrough see the online setup guide.
- Applatest uHoo app from the App Store or Play Store
- Accounta free uHoo account (tap Sign Up in the app)
- PhoneAndroid 7.0+ or iOS 15+
- Powera standard power outlet
- Wi-Fi802.11ax at 2.4 GHz and/or 5 GHz, WPA/WPA2/WPA3-Personal
At least 1 meter above the floor in an area with good airflow. Keep it away from direct heat, air vents, and open windows for the most accurate readings. More tips in this article.
Check your spam folder for an email from no-reply@getuhoo.com. If it is still not there, email us at support@getuhoo.com and we will sort it out.
Email us at support@getuhoo.com with your uHoo account email, a photo of the label on the bottom of the device, and a copy of your purchase receipt.
About the device
No. Core monitoring works without any subscription, forever. You get real-time readings across all 9 parameters, instant alerts, your full air quality history, and the app from the moment you plug it in. Guard and Command are optional top-ups you can try free for 3 months when you buy Caeli.
Nine indoor air quality parameters: CO₂, PM2.5, VOCs, humidity, temperature, air pressure, NO₂, CO, and ozone. All nine are measured every minute and appear live in the app.
Yes, Caeli requires a continuous Wi-Fi connection for real-time monitoring and alerts. If your Wi-Fi drops, it stores up to 24 hours of data locally and uploads everything automatically once reconnected, so your history stays complete.
Yes. In your router logs you may see Caeli disconnect and reconnect about once a minute. That is part of the device's energy-saving feature and not a fault.
No. Caeli checks for new firmware every 24 hours and installs updates automatically.
Reset your Caeli and set it up again with the new network. This article walks you through resetting.
The gas sensors need a warm-up period on first use. CO₂ needs at least 48 hours of continuous use, while VOC, NO₂, and ozone each need at least 24 hours. If the device is turned off or loses power, the warm-up restarts. Readings will fluctuate during this period and can be ignored.
It deletes the Wi-Fi network stored on the device and returns Caeli to setup mode so you can connect it to a different network. It does not delete your account or air quality history.
Caeli uses professional-grade sensors across all nine parameters. See the full accuracy table in the Technical Specifications section on the Caeli page.
Full connectivity specifications for Caeli are available here.
Guard and Command top-ups
Guard and Command are optional top-ups that add intelligence layers on top of Caeli's core monitoring. Guard is the full health intelligence layer, giving you four proprietary indices (Mold, Virus, Influenza, and Pollen) plus Discomfort and AQI, hourly trend charts, weekly and monthly comparisons, date comparison, time-of-day patterns, room comparison, household profiles, and a web dashboard, at $79/year. Command is the smart home automation layer, connecting Caeli to Apple Home, Google Home, Alexa, Samsung SmartThings, and Home Assistant so air quality can trigger your smart devices automatically, at $59/year. Stacked bundles both for $99/year, saving $39.
Guard is uHoo's health intelligence add-on for Caeli. It gives you four proprietary indices (Mold, Virus, Influenza, and Pollen) plus Discomfort and AQI, hourly trend charts, weekly and monthly comparisons, date comparison across any parameter, time-of-day pattern summaries, room comparison across all your Caeli devices, household profiles tailored to who lives in your home, and a web dashboard at web.getuhoo.com. Where Caeli tells you what is in your air, Guard tells you what it means.
Command connects Caeli to your smart home so air quality can trigger your devices automatically. It integrates with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, and Home Assistant. You set IF/THEN rules from any of Caeli's 9 air parameters. When CO₂ climbs, ventilation switches on. When humidity drops, the humidifier kicks in. Your home acts on bad air before you notice it.
Stacked bundles Guard and Command together at $99/year, saving $39 versus buying both separately. You get the full health intelligence layer and the full smart home automation layer in one plan.
When you buy Caeli, both Guard and Command activate immediately for 3 months. Not a trial. The full thing. Before month 3 ends, we send you a reminder. Keep both with Stacked at $99/year, choose just the one you want, or do nothing and they both turn off. No charge either way.
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. Guard goes further. It takes everything Caeli measures and turns it into health intelligence: six daily indices, hourly trend charts, weekly and monthly comparisons, date comparison, time-of-day patterns, room comparison, household profiles, 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.
Yes. You can add Guard or Command at any time from your dashboard. No new hardware needed. Activates immediately.
All billing is managed at getuhoo.com. Log in to your account, go to Settings, and you will find your subscription details there. Guard and Command are not billed through the App Store or Google Play.
Caeli integrates with Apple Home, Google Home, Alexa, Samsung SmartThings, and Home Assistant out of the box. However, IF/THEN automation rules that trigger your smart devices based on specific air quality readings require Command.
Devices and rooms
While you can move your device from room to room, we recommend one per room for accurate, 24/7 coverage of your whole home.
Each additional Caeli is $249, up to 10 devices per account. All managed from the same app. Add-ons (Guard, Command, Stacked) are priced per device: Guard $79/year, Command $59/year, Stacked $99/year per device.
Yes. You can connect up to 10 Caeli devices per account, all managed from the same app.
Air quality varies from room to room. The nursery and the home office never have the same air. Monitoring multiple spaces gives you a complete picture of your home so you can improve comfort, sleep, and health across every room.
Yes. The uHoo app shows every room in real time. Guard users can also access the room comparison dashboard to see all rooms side by side with index scores, temperature, and humidity.
We recommend one Caeli for every 50 to 80 square meters (550 to 850 square feet) of open space.
Yes. Tap the "..." in the upper right of the screen and select Share. Add the new email address, then tap Transfer Ownership to move the device to a new account.
Features and the app
Yes. You get real-time push notifications whenever a parameter crosses a threshold, with a plain-language explanation of what changed and what to do about it. Alerts are a core Caeli feature — no top-up needed.
Caeli integrates with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, and Home Assistant. IF/THEN automation rules from air quality parameters require Command.
Yes. Core features update automatically. Guard and Command users also receive new indices, analytics improvements, and integration updates as they roll out.
Yes. In the app, tap the menu icon in the upper left, tap your name to open your profile, and you will find the option to change your email there.
Yes, but only after Caeli has been set up on an existing Wi-Fi network first. A brand-new device that has not been set up yet will not connect to a hotspot. Here is how to do it.
Billing
Guard and Command are billed annually and renew automatically. Guard is $79/year, Command is $59/year, Stacked (both together) is $99/year. All billing is at getuhoo.com, not through the App Store or Google Play.
We accept major credit cards including Visa, Mastercard, and AMEX, and other payment options depending on your region.
Prices are displayed in USD by default, but your total will automatically convert to your local currency at checkout.
Your Caeli device and core monitoring stay active. You will lose access to the Guard or Command features when the billing period ends, but your air quality history and core readings remain yours.
Data and privacy
Your data belongs to you. Everything Caeli measures is encrypted end-to-end and never sold or shared with any third party.
Exporting is not available on home plans. You can view your full data history anytime directly in the app or, with Guard, on the web dashboard at web.getuhoo.com.
Email us at hello@getuhoo.com with your question. You can also tap the "i" icon in the upper right of the app for context on each parameter and tips to improve it.
Warranty and support
Our support team is available anytime. Your Caeli is covered by a one-year hardware warranty from the date of purchase.
Email us at support@getuhoo.com or open a ticket through our contact page. We aim to respond within one business day.
uHoo Aura basics
uHoo Aura is our commercial-grade smart air monitor, built for offices, buildings, schools, hotels, and other workplaces. It gives facilities and sustainability teams a live, accurate view of indoor air across every space, so you can act on real data instead of guessing.
Facility managers, building owners, employers, schools, hotels, and any organization that wants to monitor, prove, and improve indoor air quality at scale.
Caeli is built for homes and tracks 9 air factors. Aura is built for buildings. It measures 13 environment sensors plus the Virus Index, supports modular add-on sensors, connects over Wi-Fi or cellular, offers API access for exporting data, and is accredited for green building certifications.
The Aura base device measures 13 parameters plus a built-in Virus Index:
- ComfortTemperature, humidity, air pressure, light, sound
- ParticlesPM1, PM2.5, PM4, PM10
- GasesTVOC, carbon monoxide, carbon dioxide, formaldehyde
- HealthVirus Index
Yes. With add-on modules you can extend the base device to track additional gases, including nitrogen dioxide, ozone, sulfur dioxide, hydrogen sulfide, and ammonia. We help you choose the right configuration for your space.
Yes. The Virus Index is built in, and uHoo's health indices translate raw readings into clear risk levels. Learn more about the Virus Index and Mold Index.
Sensors & measurement
Out of the box, every Aura tracks 13 environment parameters plus the Virus Index: temperature, relative humidity, air pressure, light, sound, PM1, PM2.5, PM4, PM10, TVOC, carbon monoxide, carbon dioxide, and formaldehyde.
Yes. Aura is modular. You can configure add-on modules to measure extra gases such as nitrogen dioxide, ozone, sulfur dioxide, hydrogen sulfide, and ammonia, so the device matches the risks specific to your environment.
Aura captures a full set of readings once per minute, continuously, around the clock.
Aura uses professional-grade sensors with a built-in fan for representative sampling. It is a RESET Air Accredited Grade B monitor and MCERTS certified for performance. Full ranges and accuracy figures are in the technical specifications.
The Virus Index is a uHoo measure that estimates the risk of airborne virus survival and transmission based on the conditions in a space, so teams can lower risk before it spreads. Read more here.
Pricing & getting started
Aura is priced per deployment, based on the number of devices, the sensors you need, and the number of locations. Pricing is custom, so reach out for a quote. Book a meeting and we'll put a plan together.
Start by booking a call with our team. We'll learn about your space and goals, recommend the right Aura setup, and handle account registration. Email business@getuhoo.com to register a business account.
Deployments scale from a single room to entire buildings and portfolios. Tell us what you're covering and we'll recommend the right number of devices.
uHoo is deployed across 80+ countries, with offices in Singapore, Hong Kong, and Tokyo, and a warehouse in the United States.
Connectivity & installation
You choose one per device when you order. Wi-Fi units run on 802.11 a/b/g/n at 2.4 GHz and 5 GHz and are set up through the mobile app. Cellular units use 4G LTE with a pre-configured micro-SIM shipped inside the device, so they work without your network. Each device uses a single protocol.
Aura runs on a 5V/2A USB adapter, or over Power over Ethernet using a PoE-to-USB converter. A built-in 3250mAh battery keeps it running for up to 15 minutes during a power or network outage.
Aura can be wall-mounted or placed on a table-top, in spaces with good airflow. A built-in fan helps it sample the air accurately. Mounting tape, screws, and wall plugs are included.
Yes. Aura receives over-the-air firmware updates automatically, so devices stay current without manual work.
For cellular units the SIM ships pre-configured, so there's nothing to set up. For Wi-Fi units, you connect the device through the mobile app during setup.
Dashboard, data & API
Through the uHoo web dashboard at web.getuhoo.com, which works in all major browsers, and the uHoo Business mobile app (iOS 11+ or Android 5.0+). Both show every zone and parameter in one place.
Yes. Aura provides API access (polling) so you can pull readings into your own systems, a building management system, or analytics tools. This is a key difference from the home plans, which don't export raw data.
Readings are captured once per minute and stored permanently in the cloud, with up to 15 minutes of local backup during a network outage. You can view data minute-by-minute or as hourly averages.
Yes. The dashboard is built to monitor multiple zones, floors, buildings, and locations together, so you can compare spaces and spot issues across a portfolio.
Yes. Your data is encrypted, kept private, and never sold.
Certifications & compliance
Aura helps you pursue and maintain WELL, LEED, BEAM, GRESB, and Green Mark by providing the continuous, documented air quality data these standards require. See our certifications hub for details.
Yes. Aura is a RESET Air Accredited Grade B monitor and a RESET Accredited Data Provider, and it is MCERTS certified for performance.
It continuously measures and logs the indoor air parameters certification bodies look for, then lets you export the reports you need to demonstrate compliance, year after year.
Aura carries radio and safety approvals including FCC, IC, CE, TELEC, NTC, and PSE, and environmental compliance including RoHS, REACH, WEEE, and Green Building Product (SGBC).
Automation & integrations
Yes. Air quality readings can trigger ventilation, HVAC, and air purification, so your building responds to conditions automatically instead of waiting for someone to notice.
Yes. Through the API you can feed live readings into a building management system, custom dashboards, or analytics platforms.
Yes. Your team gets alerts when readings cross the thresholds you set, so problems are caught and fixed early.
Support & contact
Email business@getuhoo.com, or book a meeting with our team. We support deployments end to end.
We have offices in Singapore, Hong Kong, and Tokyo, and a warehouse in Milford, Ohio in the United States.
Yes. Read case studies from organizations like Nomura Research Institute, Port of Rotterdam, and Alila on our resources page.
Yes. Aura is covered by warranty, and our team supports your rollout and ongoing monitoring.