I use Organic Maps extensivly while hiking. It works amazingly well overall without any sort of signal. Download the maps beforehand, verify the trails you wa

I use Organic Maps extensivly while hiking. It works amazingly well overall without any sort of signal. Download the maps beforehand, verify the trails you want to hike and off you go! Verifying is key, as Organic Maps doesn't really differentiate between "major hiking trail" and "random little trail that's more like bushwhacking than hiking". It even works great as a turn by turn navigator. I like going to Andorra, and one of the downsides there is no free roaming like in the EU, so it comes in handy even just for directions and finding businesses when walking around a city.