[mattygh]

Open charge point protocol (OCPP) is used by all EVs and EV chargers currently for charger management, and they are working on an enhancement that will allow your car to directly exchange payment info with the charger via the charging hardware - no more app needed. It’ll take a few years to take hold but I’m very hopeful this works out, it will make the whole thing so much easier.

[Robotbeat]

An app shouldn’t be required. A single text message should be sufficient for payment, like M-Pesa in Kenya, or even just paying with cash like on street meters.