Health & Wellness · Head-to-head
Airthings View Plus vs Aranet4 Home
Which should you buy? Our verdict on both, pulled from our full The Best Indoor Air Quality Monitors: What's Worth Buying in 2026 comparison.
The Airthings View Plus earns the top spot by covering radon, particulates, CO2 and VOCs in one reliable unit, which no rival here matches. The Aranet4 Home is the smarter buy if you only care about ventilation, offering reference-grade CO2 readings and years of battery life.
Airthings View Plus
Buy itThe rare consumer monitor that tracks radon alongside CO2, particulates and VOCs in one device.
- Seven sensors in one unit, including credible radon tracking with 7-, 30- and 365-day averages
- Low-power e-ink display and a cloud app that builds long-term history in the background
- Slows its sampling intervals on battery power unless plugged in
- Pulling raw data out for your own analysis is clumsier than it should be, and it is the priciest option here
Aranet4 Home
Buy itA lab-grade CO2 sensor and a multi-year battery, but it measures little beyond ventilation.
- NDIR CO2 sensor of the type used in professional equipment, with strong accuracy for a consumer device
- Runs for years on two AA batteries and works fully offline, storing history locally
- Reports only CO2, temperature, humidity and air pressure, with no particulate, VOC or radon sensor
- You need the phone app to see anything beyond the current reading and its recent trend
Side by side
The 6 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| Airthings View Plus Our pick | Aranet4 Home | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Homes in radon-prone areas or basements that want one device for the whole picture. | Bedrooms, classrooms and offices where stale-air CO2 is the main concern. |
| Price tier | $$$ · premium | $$ · mid-range |
| What it measures | Radon, PM2.5, CO2, VOCs, humidity, temp, pressure | CO2, temperature, humidity, pressure |
| CO2 sensor | NDIR | NDIR, reference-grade accuracy |
| Particulate (PM2.5) | Laser optical | None |
| Radon | Yes, passive alpha sensor | No |
| Power and battery | 6x AA, up to about 2 years, e-ink | 2x AA, up to about 4 years, e-ink |
| Data and app | Cloud app, up to 365-day history | Bluetooth app, offline history |
Which one is right for you?
Pick the Airthings View Plus if
homes in radon-prone areas or basements that want one device for the whole picture.
Know before buying: slows its sampling intervals on battery power unless plugged in.
Pick the Aranet4 Home if
bedrooms, classrooms and offices where stale-air CO2 is the main concern.
Know before buying: reports only CO2, temperature, humidity and air pressure, with no particulate, VOC or radon sensor.
The bottom line
Our overall pick is the Airthings View Plus - The rare consumer monitor that tracks radon alongside CO2, particulates and VOCs in one device. Choose the Aranet4 Home instead if bedrooms, classrooms and offices where stale-air CO2 is the main concern.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Indoor Air Quality Monitors: What's Worth Buying in 2026.