Hi there. You can easily download a lot of different Apps from Google Play Store or from Apple's App Store. To be honest, I can't say which one is a good one, because they are all kind of complicated - if you aren't an expert. It depends on the car you want to use it. Some of them show more diagnosis data - some not (on BMW). You must try it out! But the OBD2 does work good so far. Good luck.