First of all thank you for this amazing app (also Windy), this is by far the most pleasant render of OSM in my opinion.
But still, I think it could be improved. Especially on displaying hiking trails.
There are two points I want to discuss/propose:
hiking routes are displayed like this (retrieved from mapy.cz):
I think it's perfect but others hiking trails (not part of a route) don't have those different level of dash indicating difficulties.
Here a comparison between Windy and Komoot which have those different level of dash:
We can easily identify difficulties like this, this addition would be great don't you think?
names displayed on hiking routes are their name from OSM DB, and it's ok but they are much more known with their number, at least in France, not sure in other countries. The famest ones are GR and you can see (in the picture from this Wikipedia article) that the route is most often identify by its number on signs like GR 10, most of us don't even know thier names actually, only thier number. So I think it would be interesting to add the number next to the name. This information is usually available in ref field in OSM DB.
Here for example Voie d'Ossau - GR 108 instead of just Voie d'Ossau would be great:
What do you think? :D
Maybe those suggestions should go to mapy.cz, I don't really know how your two companies are linked.