Looking at this strictly from a user (not developer) POV, I searched for some of the apps you mentioned. OsmAnd looks positively terrible from a UI/UX perspective, and seems borderline unreadable[0].
I'm actually curious as to why F/OSS applications that aren't extremely high profile or commercially backed (Firefox) seemingly tend to have UI/X as what is probably the last possible priority ever.
OsmAnd looks positively terrible from a UI/UX perspective, and seems borderline unreadable
Yes, the renderer needs some work both in terms of prettiness and speed. It's not as polished as Google Maps, but it's definitely usable. That the map data is from OSM is a feature by itself, OSM maps are often more detailed than what you get from Google, and you can download all data, which is great for traveling. It even supports navigation.
True, but on the other hand it is very useful. It works offline, really useful when going abroad, and the OSM maps are better in many cities (worse in others).
I'm actually curious as to why F/OSS applications that aren't extremely high profile or commercially backed (Firefox) seemingly tend to have UI/X as what is probably the last possible priority ever.
[0] http://osmand.net/en/screenshots-menu.html