It’s just an app, yeah.
OpenStreetMaps is amazing, but it is a map, not a whole ecosystem like Google Maps is. As a map I find it’s often better than Google Maps, but what is still lacking are good front-ends implementing a wide range of functionality in a user friendly way.
On desktop I often use GNOME Maps, but it leaves a lot to be desired still and is obviously intended for Linux users running GNOME.
Let’s see if Loops can fill the gap. Not sure if an open source alternative could generate enough hype to be viable - maybe if TikTok is banned in the US or something.