We are adding a GPS tracking unit to our groomer. This will be required at some time in the future by the D.N.R..One advantage is that the company that leases the tracking unit provides an APP and website to see what trails have been groomed. The website can be found at gts.groomertrackingsystems.com/map . To get the APP, search the APP store on you phone for "Groomer Tracking Systems". It will work on both apple and android phones.