I like to get out on my bike from time to time and for that I use an OS LandRanger 1:50,000 map. It shows all of the smaller lanes that I ride on when out on my road bike and the off-road routes that I use when I go out on my MTB. What I'd really like is this OS map on my phone. Well it turns out that I can have just that from ViewRanger (I was only interested in the OS 1:50,000 maps of the UK but ViewRanger supplies other maps notably 1:25,000 maps of the UK and maps for other countries too inc. the US, Finland and Germany see their website for more details) . You can buy pre-selected areas for example the 1:50,000 map of the National Parks costs £25 and the whole of the UK costs around £150.

The more interesting option though is the custom maps. You download and install their Map chooser application onto your PC (WIndows only). This shows a map of the UK split into squares of 100 sq km. You can then choose which squares you want. The first 8,000 sq. km costs £20 then it seems to cost around £5 for each additional 3,000 sq. km. To give an idea of what the means you can buy more or less the whole of East Anglia for £25. What's great about this is that you can buy whichever squares you want, they don't have to be next to each other or related to the area covered by the paper LandRanger maps. No more having a map where your house is at the edge!