The app is unreliable at certain stations. It worked long enough to pull $75 from my account, but it wouldn't apply the money to my purchase. After taking my $75, I had to go inside and pay the attendant another $50 to put gas in my car. So I paid $125 for $50 in gas. Still waiting for my $75 to be returned, and it has been five days. I do not recommend using this app. Station attendant cannot help you in case of app error. Will I ever get my $75 back?