It seems that this data is captured by Apple and Google but silo'd off from any other app developers, meaning they have to reinvent the wheel and recapture all this information themselves.
Is there a way or a service to access where the user has been? (with their permission...)
If Apple or Google offered historical location data online to anyone, there would be an incredible, and justified, outcry about violation of privacy. And consider -- if this were public information, people could use it to stalk other people in surreptitious ways.
So ... no. Don't count on this kind of information being made available the the public.
Of course it does. If a user could grant permission, then a hacker could pretend to be the user and grant himself permission. It would represent a huge vulnerability, because at the exact moment that a hacker figures out a user's password, he also has access to that person's browsing history, including everywhere the victim shopped online, which would quickly become places that the hacker shops online, using the victim's identity.
No, a history log accessible to anyone pretending to be John Doe, would mean the end of the real John Doe. It would make identity theft much more dangerous that it is already.
> There are many potential benefits of allowing access.
There are also many potential benefits to doing away with privacy altogether, but that doesn't make the idea persuasive.
Logs location in the background as a pedometer, and other apps can access this data (with permission!) to do other things.