I actually use both apps, I find Organic Maps a lot nicer for looking at a map and navigating by foot or bike, and Magic Earth seems to pick more sensible car routes some times. Also the live traffic data makes it more fitting for car navigation (Organic Maps doesn’t have traffic data).
I find the Jellyfin webapp a pretty bad experience on mobile, compared to FinDroid.
I really like the webapp on my LG webOS TV (especially good with the Magic Remote) though.
So I guess it kind of depends on the platform.