I definitely recommend this seller and fast shipping too considering it comes from my friends all the way in China, thanks again my friend!!
Took a while before it was shipped but it arrived within acceptable time frame. I do not use it for RC but for regular car performance measurements. I have compared it to a higher end ‘Dragy’ which costs 3 times more and all measured times are consistently 0.09 seconds lower than the Dragy. The app works fine. Dragy can measure multiple drag times sequentially while this needs to be initiated every time you wish to do a measurement. Perhaps this can be updated in the app.
The all is fine but it would be amazing if they could also add an app dedicated to measuring real car performance, like Dragy.