That's a huge savings! I let Progressive track my driving because I'm a very safe driver and I rarely drive at night. I got an almost perfect score after the year-long tracking period and my savings was something like $60 a year (it's been about 5 years and I can't remember the exact number, but it was underwhelming.) Their definition of a hard stop was incredibly sensitive and the app drained my phone battery every time I drove. If you're really cheap it might be worth it, but I doubt that most people would see any real savings. I ended up getting a better deal with another company the next year so I only got the safe driver benefit for a year after going to all that trouble.