I have an OBDLink LX Bluetooth adapter for my Android. For quick code-pulling I use the OBDLink app. For advanced functionality I used to use the paid version of Torque but I got tired of the awful interface and now I use Dashcommand.
2007 Crown Vic P71 4.6 ~126K Miles, Royal Purple HPS 5W-30, Royal Purple Filter, Daily Driver.
2010 Escape FWD 2.5 ~84K Miles, Castrol Edge EP 5W-30, Wix Filter, Rented on Turo.