I bought this
https://www.ebay.co.uk/itm/153128812500?epid=18033706367&hash=item23a7303fd4:g:QJIAAOSw3vFbaD-i
https://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=153128812500&category=139838&pm=1&ds=0&t=1602513907000&ver=0&cspheader=1
Not expensive to buy and run and simple to fit, I haven’t wired in the engine cut off but it’s there if needed, it has a motion sensor so alerts you if the car is rocked/moved, you can set a t up to constantly track the vehicle, (which is more expensive to run) or just have text message alerts with the location in google maps.