ELM327 can do most of the OBDII vehicles, but it can't do all models. It only works with car (does not support bus truck). It support Android 4.0 - 4.4 version and does not work on iOS.

Highlights

• Supports almost OBD-II protocols.
• Connects via Bluetooth
• Batteries, Cables, or Switches not required
• Wireless (Bluetooth) 5~ 10 meters, Retrieve Fault Codes (DTCs) and clear Check Engine lights.
• Can also be used with a PC with a Bluetooth Card
• Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database).
• Clear trouble codes and turn off the MIL ("Check Engine" light)
• Set the maximum number of responses to obtain
• Remove spaces from ECU responses (to speed data transmission).
• Store a unique identifier in EEPROM
• Set the CAN mask and filter with one command.
• Easily switch between variable and fixed CAN message lengths
• Send CAN remote frames (RTRs)

Software Includes

• Scan tool_net113win (Full Version)
• Easy OBDII V2.2 (Free Version)
• OBD2Spy (Demo Version)
  
• Scan Master-ELM (Demo Version)
• wOBDCRAZY (Demo Version)