Blutooth scan tools?

I am blind troubleshooting this Pentastar motor without a live data graphing scantool. I understand the plug in heads that communicate with your phone are pretty darn good and cheap as they dont have to have the supporting display hardware built in. Soo....Im in the market for a BT scantool that gives me live data and possible graphing (ie. oil pressure) via Android interface. Any owners of this thing here with some real world usage? Maybe it can tell me what TPS is bad too....:BangHead: