Really poor design
The Flow item that you buy separately does not charge when placed in the dock and one has to hold it in vertical position for it to charge- in effect it’s always uncharged. Waste of money.
App doesn’t open anymore
App crashes immediately upon opening
Inexistent user support. Energy hog
User support is inexistent. No phone line available. You only have access to an IA-driven chat, which redirects to the FAQ (I’ve already read it, thank you). You can open a ticket on a web app, but never receive an answer. The mobile app is an energy hog. The application requires to have a 24/24 access to gps data and will not properly work otherwise (eg. access to gps data only when the app is open), which is nonsense for many user usages.
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Nice idea
Nice idea but unfortunately these devices are not very accurate in my experience. I have two and they both have quite different readings at any point in time. I think the PM sensor is perhaps too small to be reliable and my research suggests NO2 is not really possible to monitor effectively with a small sensor (it only gives relative measures, ie going up or down). For anyone wanting better quality PM data I can recommend a Raspberry Pi with the enviro+ hat and PMS5003 sensor, though its NO2 sensor still has the same limitations as the Flow.
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Drains battery and increasingly inaccurate
After using this for a few years I have decided to delete as apart from the app not having an update for some time, it drains the battery of your phone and gives dubious readings. I suggest trying an alternative product.




