Airthings has built a reputation on making invisible air quality threats visible. The View Plus is their most comprehensive monitor, moving beyond radon to track the full spectrum of what you’re breathing.

It runs for over a year on AA batteries, letting you place it anywhere without hunting for an outlet. The connected app gives you a clear, long-term view of trends for radon, particulate matter, CO2, and VOCs. You start to see how cooking raises PM2.5, or how a crowded room spikes CO2 levels, making the data immediately practical.

This monitor requires its app to function, which is a consideration. For the detail-oriented, it provides the authoritative data needed to make informed changes to your home’s environment, from adjusting ventilation to validating remediation efforts.