Is it possible to determine the location of another user in the mobile application?

Question

Mobile development

Hello!
Guys, the question in the cap is clumsily formulated, here I will describe the task in more detail.
Actually, a familiar florist asked me to make a small application that would track the location of the driver who delivers flowers to customers.
And so that he can see in real time where which carrier is now and so that customers can also see it in their personal account.
I understand that one's own position can be easily determined, but how to determine the location of another user, that's the question for me.
If someone has implemented this, or has experience in this, please provide links or suggest where to dig.
Googled the info - I only come across the definition of my own location, which does not suit me.

Answer 1

Collect permissions to use employees' devices
Collect data about the capabilities of employees' devices
Order software development for android
Order a server application where the application from android will send its coordinates