QP Smart CO2 Indoor Air Quality Monitor Wi-Fi App Alerts HD Display

I have 2 of these now and am generally pretty pleased with them. They have great battery life, big display, and the connectivity works well. Much of the functionality comes in the app, which also works well. Would like more options to view and use the data, which is the only reason not to give 5s. The only visualizations available are 24 hr line of an individual data point (CO2, temp, OR humidity) for a single device, or a 30-day line of daily high/low values). I would like to be able to overlay lines from different data points and/or devices as well as choosing different timeframes. I would also strongly prefer to be able to export data, which does not appear to be an option at all. Overall good device, and what is available in the app works well, just wish there were a little more flexibility in the app and with data.

Hello, After more than a year of purchasing and comparing 5 CO2 monitors (including 1 junk monitor from ebay), I regret to report that I am disappointed in the new CO2 monitor. The screen is quite hard to see across a room in daylight, and the placement of the green/yellow/red indicators is not great. The temp/humidity readings are in really small font and not legible at distance. I also did not find my unit as accurate as I would have expected (comparing to Aranet4, CO2 Click, & QP Lite, all had for more than a year, all calibrated; Click not pictured). I think the Aranet runs perhaps 50ppm high, and the CO2 Monitor tended to be 70 to 100 below its measure for the two days I tracked it. It definitely had to be calibrated upon first use. Yes, I love the battery life! But that's the only real plus side for me -- for less than an additional $30, I will keep and prioritize the QP Air Monitor Lite that you also offer. Its bright screen and sufficiently accurate PM sensors are real benefits (as are easy-to-see temp/humidity readings on rotation). If you could just extend the Lite's battery life, you'd have the piece de resistance in my book!!