I had one that I updated the firmware on 6 weeks ago. The app crashed and now I get errors. I have emailed Tech Support but not heard back. JSCAN can be used for turning off the seatbelt chime, adding a backup camera, tire pressure/Size, headlight mods ,using lockers in 4Hi & Swaybar disconnect. The only thing I miss from Superchips is watching engine temp & knock sensors. That is hard to do from a cell Phone. I was also concerned about loosing the Superchips TD from theft or just bouncing out of the vehicle.