About Cool Tach
Cool Tach is a simple tachometer that uses an OBD-II Bluetooth interface device to read your engine RPMs.
**Note** This app requires a compatible OBD Bluetooth hardware interface that is sold separately.
Uses:
* Troubleshooting
* Auxiliary gauge inside the vehicle
-------------------------
DISCLAIMER: This app requires the purchase of a compatible third party hardware interface to communicate with the vehicle's OBD-II port.