Airthings View Plus vs Aranet4 HOME

The Airthings View Plus wins overall for breadth, leading on sensors, connectivity, integrations and warranty, with seven pollutant sensors and Wi-Fi. The Aranet4 HOME earns a higher owner rating and is the benchmark CO2 monitor, with longer battery life and reference-grade accuracy, but it focuses on CO2 rather than the full picture.

Scope. The Airthings View Plus is an all-in-one monitor covering radon, PM2.5, CO2, VOCs, temperature, humidity and pressure over Wi-Fi and Bluetooth. The Aranet4 HOME is a dedicated CO2 monitor (plus temperature, humidity and pressure) on Bluetooth only, prized for accuracy and portability.

The Aranet4 HOME is widely treated as the consumer reference for CO2, with an NDIR sensor owners compare to professional instruments and can recalibrate. The Airthings View Plus gives useful CO2 as part of its seven-sensor picture, but CO2 purists favor the Aranet.

The Aranet4 HOME runs up to 4 years on two AA cells with an always-on e-ink screen you can read across a room. The Airthings View Plus runs about 2 years and also uses an e-ink display, but adds Wi-Fi for remote data the Aranet lacks.

Choose the Airthings View Plus if you want radon, CO2, particulates and VOCs in one Wi-Fi-connected unit with broad integrations and a 5-year warranty, especially for whole-home indoor air quality monitoring.

Choose the Aranet4 HOME if CO2 and ventilation are your focus and you want the most trusted portable CO2 monitor: instant e-ink readability, up to 4 years of battery life and accuracy you can carry between rooms or take traveling.