What device is this, and what app please
It's a GT102A tracker I had hard-wired in my car, I also removed the casing to make it slimmer, so it fits between headlining and obscuration band at the top of the windscreen - almost instant fix on satellites and impossible to tell it's there.
The app is GPS-Trace Orange and is from the same guys as this web service: https://gps-trace.com/
The app is pretty slick, and simple - exactly what you need to know where your car is, and nothing else.
Web interface is free (as is the app), for up to 5 trackers, if I'm not mistaken. Some cool features too - e.g. it emails you when set event occurs - like "Mercedes left Bodyshop" or "Mercedes speed is over 70mph" - very handy.
If you get the same unit, I'd be happy to advise on type of SIM card, server settings, etc, etc