Originally Posted By 2007CrownVic
You can get a bluetooth OBD adapter on Amazon for $10 or so and the paid version of torque which is only $5 will give you tach and a whole lot more.


I thought you needed a "smart" phone for that stuff. My phone is so outdated about 10 years old. I do not want to upgrade my phone just for a tach. I prefer to have a hard one installed in car.