Can my employer track where have I been during the day iPhone?

My company gave me an iPhone, I have to visit multiple locations during the day (with my own car and my gas) I'm curious if my employer can actually track from distance which places I visited. By the way I don't plan on cheating! I'm actually very responsible and have to get signatures at the places anyway. One co worker suggested that tracking us was the reason why they changed our phones to iPhones. They are usually so cheap with the employees.

If the company just handed you the iPhone, yes. Theft is a very serious topic and to solve this, companies track their belongings very thoroughly; however, they must still abide by privacy laws

Yes they can with gps tracker apps.