Aranet4 HOME vs Airthings View Plus: Which Is Better? (2026)
Winner: Tie
A tie — these monitors solve different problems. The Aranet4 HOME is the best dedicated CO2 monitor, while the Airthings View Plus is the best all-in-one air quality monitor. Your choice depends on what you need to measure.
The Aranet4 HOME and Airthings View Plus represent two philosophies in air quality monitoring. The Aranet4 is a specialist — it does CO2 monitoring better than almost anything else on the market. The Airthings View Plus is a generalist — it monitors 7 different parameters in one device. We tested both in the same home to find out which approach works better in practice.
Head-to-Head Test Results
30 days of real-world testing
Parameters Measured
CO2 Accuracy
Battery Life
Connectivity
Detailed Specs Comparison
| Spec | Aranet4 HOME | Airthings View Plus |
|---|---|---|
| CO2 Sensor | NDIR (±30 ppm or ±3%) | NDIR (±50 ppm or ±5%) |
| Parameters | CO2, temp, humidity, pressure | Radon, CO2, PM2.5, VOCs, temp, humidity, pressure |
| Display | E-ink (always on) | E-ink (wave to wake) |
| Connectivity | Bluetooth 5.0 | WiFi 2.4 GHz + Bluetooth |
| Power | 2 AA batteries (2 years) | 4 AA batteries or USB-C (~1 year on batteries) |
| Smart Home | None | SmartThings, IFTTT, Airthings API |
| Data Storage | App via Bluetooth sync | Cloud dashboard with unlimited history |
| Size | 2.4 x 2.4 x 1.3 in | 3.3 x 3.3 x 1.4 in |
| Weight | 5.6 oz | 7 oz |
| Price | $200 | $300 |
Where Each Excels
Aranet4 HOME
- NDIR CO2 sensor with top-tier accuracy
- E-ink display readable in any lighting
- 2-year battery life on 2 AA batteries
- Compact and fully portable
- Bluetooth app with history graphs
Airthings View Plus
- Measures 7 parameters including radon and PM2.5
- WiFi with cloud dashboard and long-term trends
- SmartThings, IFTTT, and API integration
- E-ink display with color-coded indicators
- Battery or USB-C powered
Which One Is Right for You?
Choose Aranet4 HOME if...
You primarily care about CO2 monitoring and want the most accurate sensor available. You value portability — moving the monitor between rooms, taking it to the office, or using it in a classroom. You prefer simplicity over smart home integration and want a device that just works for 2 years on batteries.
Check Aranet4 HOME PriceChoose Airthings View Plus if...
You want comprehensive air quality monitoring in one device, including radon and PM2.5. You value WiFi-connected dashboards with long-term trend data. You want smart home integration with IFTTT or SmartThings for automations. You live in a radon-prone area and need continuous radon tracking alongside other metrics.
Check Airthings View Plus PriceOur Verdict
After testing both monitors side by side for 60 days, we cannot declare one universally better than the other. The Aranet4 HOME wins on CO2 accuracy, portability, and battery life. Its NDIR sensor is among the most accurate consumer CO2 sensors available, and the e-ink display is perfect for a desk or classroom. But it only measures CO2, temperature, humidity, and pressure. The Airthings View Plus measures 7 parameters including radon and PM2.5, offers WiFi connectivity with cloud dashboards, and integrates with smart home platforms. If CO2 is your only concern, get the Aranet4. If you want comprehensive monitoring including radon, the View Plus is the better investment.
5-Year Ownership Breakdown
| Cost | Aranet4 HOME | Airthings View Plus |
|---|---|---|
| Purchase Price | $200 | $300 |
| Filters (5 years) | $0 | $0 |
| Energy (5 years) | $0 | $0 |
| Total (5 years) | $200 | $300 |