What is the Wheres My Concrete application, how does it work?

According to the introduction of Trckr, Wheres My Concrete is a Business app on the Android platform. There is currently a 2.1.1 version released on Jul 26, 2017, you can see the details below.

Track everything concrete in Real-time:
- Trucks to your jobsites with live traffic & ETAs
- Current, upcoming, and past orders
- Approved mix designs
- Delivery tickets with digital signatures
- Place order requests
- Opt into order summary emails