This is the one Android app I have used without discontinuity since almost the very beginning. So, around 13 years. The team behind it are fairly well organised and responsive, and the app continues to improve steadily. The fact that so few normies have even heard of it is still a source of mystery to me. It's a treasure.
Not OP, but this looks like 3D Relief (requires OpenGL render) + Terrain (Avalanche mode) + Contour Lines + Weather Plug-in. My setup is quite similar, and I also have an optional satellite/aerial imagery layer, a Hiking map style, and quick actions set up to toggle all those on or off when I need to declutter the map. AFAIR all require Premium/Plus to use.
I used it for the first time last week on a hike. It worked, but not intuitively at all. I had downloaded a GPX file which I imported in Osmand, and before I got the navigation working I had inadvertly added two waypoints.
Yeah it doesn't have the friendliest user interface, but it does have an enormous amount of functionality when you eventually find the menu you are looking for.
Yep, happy that more and more people recognize it for a treasure of features and customization that it is. For me, it's the best app for trekking, hiking, and offroading there is, even if we consider proprietary stuff like Fatmap and such.
The nice slick interface of Organic Maps makes me wish it loaded and zoomed smoother. But yeah the things you can do in OSMand as a fully offline app is incredible once it's set up how you want it.