I am looking for an App to use with an OBD2 Code Reader. I bought a Veepeak BLE Bluetooth Adapter. I got the Auto Doctor App which in it's base form claimed you could do all kinds of wonderful things - according to the App Store. (I wanted to be able to use it to set up instrumentation of Short Term/Long Term Fuel Trim). It won't do hardly anything in the Base (Free) package. It won't even clear trouble codes! Pretty worthless in my opinion. Their App description is very misleading and the upgrades are expensive from what I have heard. What App do you recommend? and how much does it cost? to get what I'm trying to get.