The main reason to buy a smart bluetooth thermometer over the WiFi version is that you expect it to work offline, but this version needs internet access to display information in the app. So if you don't have internet it can't even show live readings on your phone or tablet and just becomes a desktop thermometer/hygrometer. It also does not do justice to this task due to the lack of a backlight. It's as accurate as you should expect for the price. Not great, but not bad either. Overall there are much better options out there and I would recommend you to buy something else.
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