SizzApp GPS Tracker System. Updated : – Please do read the comments section for updates as this system not is restricted and no longer support by us. The last few months with the huge increase in stolen bikes being reported by the local members of the biker community and updates that I also get from working with the Police as well as post I make on the Portsmouth Stolen Motorcycles (Yep plug for my other page I run, so head over and give it a like) the worry of my own bike getting nabbed by some scallywags worried me enough …