Offline maps for hiking?

[bertie11]

I just bought Outdoor Navigation for my Lumia 535, it was working fine for a day ot two but this morning I switched the phone on and started ON but it just stayed on it's start screen. I kept restarting it and then it did go the options 'circle' but when I pressed Map it came up with a blurred image just recognisable as a map. Then it was showing a black screen with my location symbol but no map, nothing.I got home again and tried the app. This time it started up at the map of Africa and it said to check my location service. It is always turned on so I don't know what is going on. When I entered my location again it went straight to my area and the map showed the correct image.
I had wondered if it is feasible to uninstall and then reinstall it but I don't know if the phone remembers that I had already paid for the app.
This is my first smartphone + paid apps so I'm trying to learn!

 

[popeyethesailor0]

I would like to share option that I use as my backup navigation.
I use Nokia WindowsPhone 8.1 with RasterChartPlotter (RasterChartPlotter - navigation) application.
Application supports OSM, UMP charts, Open Sea Map etc. Maps are available offline. You can also type map source manually.
When it comes to paper maps. You can scan them next use mapTiler(MapTiler - map overlay, cut map tiles for Google Maps, GIS layers and mobile apps ? MapTiler) to calibrate and copy to phone's SD Card. RasterChartPlotter also supports such maps.