This app was mentioned in 5 comments, with an average of 3.20 upvotes
Subway needs an app where I can customize my sandwich order and they just scan the QR code.
EDIT: Hold the phone. They have an app and they have online ordering. I promise I don't work for Subway.
Sometimes developers strict things like device types and screen sizes, you would need to contact the developer to see what the issue is.
However I just checked, and what appears to be the official app is installing fine for me. https://play.google.com/store/apps/details?id=com.subway.mobile.subwayapp03&gl=US
Their official one works best, and not just in NYC.