Wi-Fi 327 can be used on Iphone,Ipad and so on...
Wi-Fi OBD VGATE Technical Specifications
SSID: CLKDevices
IP: 192.168.0.10
Subnet: 255.255.255.0
Port: 35000
Range: 50 ft. (Line of sight)
Antenna: Internal
Power Consumption: 0.75 Watts (With Power Switch)
Wi-Fi Standard: 802.11a/b/g
Operating Temperature: -15 to 100 Deg Celsius
Plastic: Automotive Grade
Physical Dimensions: 2.75 x 1.25 x 1.2 inches

Features:
CLK is capable of communicating with vehicles which adopt following protocols:
ISO 9141
ISO 11898(aka. CAN)
ISO 14230(aka. KWP2000)
ISO 15765(aka. CAN)
SAE J1939

WI-FI OBD AUTO CHECKER is able to detect and interpret these protocols automatically. It also provides support for high speed communications and a low power sleep mode. It use AT commands to communicate with a host device (PC, notebook, iPhone, iPod touch, iPad and so on). There are plenty of software packages available, which are fully compatible with WI-FI OBD AUTO CHECKER. Some of them have pretty useful features, such as engine running parameters monitoring, DTC reading and clearing, MPG meter, etc. You can even write your own software on a specified hardware platform if you wish, because the AT commands are fully documented and very well explained.
WI-FI OBD AUTO CHECKER is measuring only 2.7 x 1.25x 0.9 inches, and it comes attached with a 6 ft. OBDII cable for easy installation. It also comes included with a power switch built-in to prevent the need for having to constantly disconnect your unit from the OBDII port. It is compatible with 1996 and later vehicles. Connecting to your iPhone / iPod touch /iPad is made by WIFI connection in adHoc mode.
Elder OBD compatible vehicles has a sticker indicates that the vehicle is OBD compatible. Model year 1996 and newer vehicles are compliant by default, and will not have this sticker.
Following are some of the parameters which could be read from the vehicle.

Vehicle Speed
RPM
Fuel Consumption
Engine Coolant Temp
Fuel Pressure
Calculated Engine Load
Throttle Position
Intake Manifold Pressure
Air Intake Temp
Timing Advance
Mass Air Flow
Fuel Level
Barometric Pressure
EVAP System Vapor Pressure
Fuel Trim