2014 BMW 320i; 2023 Chevy Bolt (wife's car)
It's not needed; I don't think RedSkyBlackDream suggested that it was a necessity for anyone.^^^Why do you actually need that info on your phone?
Subscription services such as OnStar and HondaLink, especially phone app based services, are touted by automakers for enhancing convenience and safety. Consumers should investigate those claims thoroughly before signing up, and be aware that such services and the associated infrastructure come with serious vulnerabilities and risks. The infamous OnStar buffer overflow exploit circa 2010 is just one example.
GM Took 5 Years to Fix a Full-Takeover Hack in Millions of OnStar Cars