QP Lite Air Quality Monitor

Good little Air Quality Monitor

We are enjoying our air quality monitor and like that it also shows PM2.5 and PM10 as well as the other measures. I gave it 4 stars as I would prefer that it worked via Bluetooth and not WiFi. Support staff are helpful. I find it's quite reliable when used beside the Aranet4.

CO2 inaccurate, unable to calibrate

The CO2 reading is inaccurate, reading about 30-40% lower than other CO2 monitors I've compared it against. The app has a way to calibrate it, but it appears disabled - it says that it needs to update the firmware to access that feature, but the app also says it's on the latest firmware. Frustrating.