Good day everyone

I have recently gotten into off-roading and I am using a normal gps tom-tom start 20 and find it not possible to save off-road favorites as they are not on a marked road like Atlantis Dunes gps coordinates

However my beloved jimny does have a android based vehicle navigational radio and was wondering if anyone could recommend a good app that I could use for off-road gps coordinates navigation, i don't need something with roads maybe something compass style with a arrow pointing me in right direction, but must be able to work offline

Thanks in advance