Ugh. I despise "app based" or "tracking gadget based" insurance systems. You are, if you know it or not, broadcasting literally everything about your driving to every data aggregator who wants to buy a copy of it.
Of course, a modern "connected car" is probably doing the same thing.
Being charged insurance for miles I ride, unless I remember to disable it, is beyond absurd. I don't even have my phone powered on most of the time I drive, though.
I get low mileage discounts on some of my less frequently driven vehicles, and every now and then get a letter from my insurance company asking me for the odometer reading on them.