TIL: there is a #OpenChargeMap for EV Chargers - based on #OpenStreetMap.
https://openchargemap.org
Many Apps rely on data from the german page #GoingElectric, I think it is a good development to have a independent database.

(I spent my evening in Frankfurt to hook up a meagre 1.5kW charger with the hotel. I had to pay 15 EUR for the service. These 15 EUR will get me 100 km with some luck, enough to get to the next supercharger.

Dissatisfied with this setup I checked #OpenChargeMap where I could find a Lidl just 800m away. Figured I could park it there, walk to the hotel and go back in the morning. However, #Lidl for some reason won't supply this charging service when the store is closed, and uses yet another app.)