Constant app errors on every screen caused me on two recent occasions to not be able to use my rewards at the pump. Though T-mobile has this cool reward program, I am done as a Shell customer bc of the app's broken state. 😡 Edit: how on earth does this thing have a 4.4 rating average? It. Literally has NEVER worked in over a year as a t-mobile customer who never gets to enjoy customer perks bc of this broken app. Also no comments or feedback from the developer on a 1*? Very telling.