Answers
Do my customers need to install anything?
No. Customers never interact with Scorto at all. They order through whichever channel you already use (FoodPanda, Uber Eats, or your own ordering system) and you keep the relationship. Scorto handles the delivery behind that.
In more detail
This matters more than it sounds. Asking a customer to install anything to receive a delivery is asking them to do work for your convenience, and most will not. Any delivery system that depends on customer adoption is a system that fails on its first busy night.
What the customer sees is whatever your channel already sends them. If you want to send tracking, you can, but nothing about the delivery requires them to hold an account, download an app, or learn a new name.