If they have the ability to add options to an individual product, they're already a mile ahead of Square. Square's biggest oversight with their Register app is

If they have the ability to add options to an individual product, they're already a mile ahead of Square. Square's biggest oversight with their Register app is that it's completely unusable for things like food orders. You can't add bacon to a burger with the touch of a button, you have to type it in. And if that bacon is an additional charge, you have to go back to the categories section, then go into an extras category, and add it to the order as a separate product. If you've got five or ten additional charges for extras, you've now got a receipt that is very long and nonsensical, and you've wasted a non-trivial amount of time needlessly switching between categories.