How to prepare your shop menu in five minutes? The easiest way is to install "menu fly" App on your phone or tablet. And write menu on it.
When people go through your store,They can use "Menu in air" app to see your shop menu or other information. As your shops wifi password.
Your shop information is automatically recorded in Their phone. The phone does not need an Internet connection or wifi.
Demo https://youtu.be/Q6EUgN7uVwQ