I'm looking for recommendations for a Sat Nav which can be downloaded onto an Android Phone and which provides a good visual of the road, the road lanes and advance warning of changing lanes etc, directions etc. Having not driven on the UK mainland for three years, I need as much guidance as I can get, as where I live there are no motorways and no bus lanes. I've looked a the Tom Tom Go Satnav and wonder what if visual display is good, for example showing the number of lanes, bus lanes as mentioned, and plenty of warning when leaving a motorway.

Thanks in advance.