Review on Enhance Performance with ECRI Calibration Module for 2007-17 Jeep Wrangler JK - Unlock Features via in-App Purchase PER Vehicle by Ryan Olsen

I read reviews from people who had problems syncing the app and the module. I don't have such problems. I have already paid for the vehicle registration together with the module. Plug it into the port, turn on the key (don't turn off the car) and open the app. Bingo! I changed the setting I wanted and was ready to go. The only thing missing was the ability to adjust the idle speed. It would be nice for off-road since I have a manual transmission. Plus, he does what they say for half the price of other programmers.