I'm working with GPS tracking systems for 10 years.
I have developed GPS tracking applications that are using in Russia, Turkey, Belarus, Ukraine, Azerbaycan, Emirates, Australia, China and India.
For GPS tracking you can use more than 40 tracking devices or smartphones.
System supports a large set of sensors and equipment.
At a moment system serves about 30000 trackers.
The copy of my system on your server will cost from 700$.
Support and consultations are free.