Do you know any online map or mobile application indexing public shower in France?
I already found public free shower along the way, during my bicycle trips. It really made my days!
Would be awesome to have a map showing free shower positions.
Not on Front Page
You can use Osmand app. That's an awesome app that allow to show many points of interest on the map. Among them you'll find "shower". And you can even select ones that are free. Osmand use OpenStreetMap data, If you find a shower that it'is not yet on the map you can add it, then other people will show it.