This site would display the same sort of information as All Trails: descriptions, pictures, waypoints, information about trail dangers, trail maps, time to complete the trail, distance, elevation gain, hiking season, etc.
I apologize if this is not the right community for this post. If there is a more appropriate community, please let me know, and I will repost this there.
Opened OsmAnd installed from F-Droid, enabled “hiking routes”, checked one I’ve completed yesterday. It shows: name, operator, trail on the map, length, altitude over distance (graph), average altitude, total uphill climb, total downhill. Pictures might be available as a plugin, not sure; no season info or dangers info in sight. Hope that helps.