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.
2010 Ford Escape FWD 2.5L ~64K: Castrol Magnatec 5W-20, ACDelco Filter.
1997 Chevy Suburban 4x4 5.7L ~213K: Chevron Supreme 5W-30, Microgard Filter.