Airthings View Plus Review: Is the Smart Radon Monitor Worth $229?

What You're Actually Buying

The View Plus costs $90 more than the Corentium Home. That premium buys you:

1. Wi-Fi connectivity — readings go to the app, not just the display
2. Smartphone alerts — push notification when radon exceeds your threshold
3. Historical charts — graph radon (and all other sensors) over days, weeks, months
4. 6 additional sensors — CO2, humidity, temperature, air pressure, VOCs, particulate matter
5. Smart home integration — works with Alexa and Google Home

Whether that's worth $90 depends entirely on what you actually need.

Radon Performance

The radon sensor in the View Plus performs identically to the Corentium — same alpha spectroscopy, same NRPP listing, same ±10% accuracy specification. You're not getting better radon data; you're getting the same data with more delivery mechanisms.

The app's radon display includes:

• Current reading (updates every hour)
• 24-hour and 7-day averages
• Historical graph with zoom controls
• Color-coded risk indicator (green/amber/red zones)
• Notification when readings cross your set threshold

For someone who just mitigated and wants to watch system performance week-by-week, the historical graph alone is genuinely useful.

The Non-Radon Sensors

CO2: Accurate for indoor air quality assessment; correlates well with ventilation adequacy. Useful if you're concerned about stuffy air or have a tight-envelope modern home.

Humidity: Accurate, useful for crawl space monitoring (though the View Plus isn't designed for the humidity extremes of an unfinished crawl space).

Temperature: Standard thermistor. Accurate.

VOCs: Broad-spectrum sensor that detects total volatile organic compounds. Good for flagging off-gassing from new furniture, fresh paint, or cleaning products. Less useful for precise air quality diagnostics — it's a flag, not an analysis.

Particulate matter (PM1/PM2.5/PM10): Useful for detecting wildfire smoke infiltration, cooking smoke, or dust events. A genuine addition for air quality-conscious homeowners.

Air pressure: Weather and altitude data. Mainly used by the Airthings algorithm to contextualize radon readings (barometric pressure affects radon entry rates).

The App Experience

Airthings' app (iOS and Android) is well-designed. Setup takes 5–10 minutes. The main dashboard shows all sensor readings in color-coded cards. Radon is prominently featured with clear zone indicators.

Historical data is the standout feature: you can graph 30 days of radon readings and see exactly when levels spike (typically evenings when the house seals up, winter months when stack effect increases). This context is genuinely interesting and actionable — if you see radon rising every winter, it may indicate the mitigation system needs attention.

Who Should Buy the View Plus

Good fit:

• Homeowners who want to track radon seasonally and catch fan performance degradation early
• Smart home enthusiasts who want everything in one app
• People who want alerts without being tethered to a physical display
• Anyone already concerned about broader indoor air quality (CO2, VOCs, PM2.5)

Stick with the Corentium if:

• You want radon data only, no extra features
• You're skeptical of app dependency or prefer no cloud involvement
• You don't need smartphone alerts — you'll just check periodically

The Subscription Question

Free tier: full app access, all sensor readings, real-time alerts, 48 hours of historical data. Paid plan (~$9.99/month or $59.99/year): extended historical data (1+ year), deeper analytics, priority support.

For most users, the free tier is sufficient. The paid plan makes sense if you want year-over-year seasonal comparisons.

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