Wells TA5005 GoTech Bluetooth Mobile OBDII Diagnostic Tool for iPhone, iPad, Android Phone and Tablet Transforms your Bluetooth enabled smartphone or tablet into a mobile OBDII diagnostic tool that can store data for up to 10 vehicles at a time Perform vehicle smog test, scan vehicles, monitor performance in real time, define powertrain trouble codes, clear check engine lights Access troubleshooting and repair tips from Master ASE-certified technicians from an extensive database that includes over 10-million possible causes No app purchases, subscription fees or hidden costs; The app is free with the purchase of the GoTech Scan Tool Designed for iPhone, iPad and Android mobile devices