A free program for Android, by Stations Electra.

Electra is a fast, safe, and easy way for you to find and book the best electric car charging station in your city. With Electra, you can find and book a time slot at any electric car charging station in the city. The app allows you to see all the available electric car charging stations and their availability in your city. Once you find a station you want to use, you can book a time slot, choose the type of charging you want to do, and pay the price you see on the website. The service is super fast, easy to use, and secure.