What app? :-) You mean Google/Android Pay or Apple Pay or anything else? (such as the wonderfully low-tech solution of placing a miniature NFC credit card stic

What app? :-) You mean Google/Android Pay or Apple Pay or anything else? (such as the wonderfully low-tech solution of placing a miniature NFC credit card sticker on the back of your phone or in your phone case). I'm not sure what you mean by "getting adoption", but when I stand in line in Warsaw, almost all payments are contactless, and probably 1/3 are done using a phone.