This is cool! How does it compare to e.g. an Aranet4? I got one to detect when there is a high risk of COVID-19 aerosols lingering and generally carry it in my bag. That way I can check the reading using my phone.

The Aranet4 is also interesting to carry on a flight, it logs the Co2, pressure, and temperature. I can see my arrival/departure on trips by looking for the pressure drops in the graphs.