It's nothing to do with iPhone or Android, it's the navigation software on the DUDU7 I am talking about as per my image. This is the built in nav software on the unit. I cant zoom in on the map and keep it moving with the arrow/vehicle. It always stops the map moving so if it is left I can drive off the map. I have to press re-centre for it to follow the arrow/car but it then zooms back out too far from the map.