This is the premium OBD2 to Bluetooth adapter on the market. There are other lower cost options but this one is in my opinion one of the best. Shuts off when not in use so it won't drain the battery when left plugged in and has much faster performance than the cheap entry level adapters.

Works with most Android OBD2 apps.

If using a permanently installed Android tablet computer to display sensor data in real time, this is the adapter to get because of the speed and battery drain protection. If just looking for the ability to run occasional diagnostics, a lower cost adapter will do.