Take a picture and download all the pages of your menus (images or pdf). A unique QR code is assigned to you. Display this QR code on your tables or walls. You therefore have no entry of your menu to do. Just take a picture of it as best as possible!
Scanning a QR code has become commonplace, either directly with the mobile camera for newer ones, or via a QR scan app that most people have now. In short, no application to have your customers install!
Instantly, the pages of your cards and menus are displayed on your customers' mobiles. They can switch from one to the other and zoom. You therefore have no card to give, to clean, to print, to throw away.
Print this QR code, put it on your tables or walls