Updated about 4 hours ago

PHOTO: The mechanic helped the victim buy the car he then controlled. (Supplied: Unsplash)

A Hobart man deliberately downloaded and set up an online application that gave him control over the stop and start function of his ex-lover's car and allowed him to track her movements, a court has heard.

The 38-year-old pleaded guilty in the Magistrates Court in Hobart to stalking his ex-girlfriend last year.

The two had dated for six months.

"I was in shock and fear for my life when I realised he was stalking me and had control of my car," she told the court.

"What he did is despicable and I am still trying to come to terms with the scope of violation and trauma I have experienced."

The court heard the mechanic had made a "concerted attempt" to monitor his ex-partner's movements both by "physical covert surveillance" and "review of data".

It was also revealed he had helped his victim to buy a Land Rover when they were dating and as a consequence had access to the vehicle's VIN, which allowed him to set up the app.

Unbeknownst to the victim, the app sent him live information about her movements to his email account and enabled him to remotely control the car.

PHOTO: The man could turn the car on and off as well as control the windows. (Supplied: Unsplash)

He also bought spyware and paid a monthly fee to monitor her phone location.