Where can I use this?

Works well when I can find a station where this works. What I find a problem is when I use the station finder and go there, only to find that station doesnt work with the app. If you let me go out of my way because of the app, but then the app doesnt work at that station, then what is the point?

Went to a station this week. When prompted for pump number, tried to type in "11". Well, the app would not accept the second "1". I assume youre stuck if you park at a pump marked with 2 digits. Not convenient if you dont want to be bothered scanning the barcode on the pump. So, I grabbed an image of the QR code on the pump and got my fuel.

Ski bum2 about Exxon Mobil Rewards+, v4.1.1