Found this on BMW website -https:/tourstart.org
You can plan rides on your computer and easily transfer to your cell phone or share with others.
Works as well or better than a Garmin GPS. :-)
Very easy to plan a route.
answer your questions here https:/tourstart.org/faq
Price for a year subscription is $19.
I have been using this for a few months now.
Started on a standard size iPhone, went to a iPhone 12 pro Max and it works even better.
For those who are tired of fighting Garmin and do not want to carry a phone and a Garmin, this seems to be a good solution.
I have used this in central valley and have yet to loose reception.
See attached for samples of Central Valley loops