the problem I have in my area with this app... Anytime I get gas at a Shell station or a circle k station 95% of the time I do not get cash back because the store claims they have no proof of my purchase which is absolutely ridiculous considering I use the same card every single place I get gas and all the other stations I use like speedway race track BP have always and promptly give me my return on fuel that I purchased.. I advise staying away from circle k and shell when using the app ...