Does this app or any others show source of electricity? In the U.S. this can vary from coal, natural gas to wind/solar. It would be useful to be able to choose between them
No, we don’t record that information specifically at the moment. For that I would suggest finding an official source that has some kind of geographic reference (like zip code or position), you could then tell based on the address or position of a charging location what grid elecity mix it’s likely to have. It wouldn’t be able to tell you local factors such as onsite solar etc, however that could be mentioned in the general comments for the charging location.