Try the memory map app.
I think you can download it for free from memory map's website. I have their app on an Iphone and it was free.
Check it works with a free map and tells you where you are etc, then download the CAA 1:500000 map. You can input routes and waypoints, it gives you a velocity vector (a line showing where you will be in 5 minutes' time), all with a moving CAA chart.
It costs £20 basically gives you an Airbox Aware but without the airspace warnings.
I've flown with it because my group plane has a very archaic monochrome GPS that we can't work properly. The Iphone tells us exactly where we are on the chart and I use it to simply find myself on a chart more quickly without the need to fiddle with the aircraft's overly complex GPS interface.
FF.