I used this app on my GTI and it worked great. Didn't track that many parameters though. I suspect it will read a lot more on our cars. It does reset codes, but I have no idea about "hidden tuner codes".
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Old: '06 Cooper S w/RMW 2.0L Stroker | '13 BMW 335i 6mt | '11 BMW M3 ZCP | '09 Porsche Boxster (FS)
New: '18 ///M2 LCI | '17 X1 xDrive | '17 Bolt EV Premier
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