You'll be happy you did. That app is a must have for any Jeep owner. It also doubles as a OBDII code reader, which is awesome as well.
Two questions, using this Jscan, can it also be used on a TJ?
I had to switch my TrailDash to the JK from my TJ to program the tire size so the speedometer would work on the JK. Can you use this Jscan on the JK to set tire size to program the speedometer?
Would be great to put my trail dash back on my TJ, kids get all my toys, ha.