this kind of stuff is everywhere. ios does the same thing. when you install an app, they allow deep linking of their urls. for example, if you install the am

this kind of stuff is everywhere. ios does the same thing. when you install an app, they allow deep linking of their urls. for example, if you install the amazon app, any amazon link loaded on your phone can be intercepted by it (messages, mail, browser, etc) I think the same kinds of things can be done with location services. A store app can do fine-grained bluetooth location with ibeacons in their store. I don't know the state-of-the-art in cross-application tracking. I'm pretty sure sdks added to multiple apps can do the same sort of thing. At some point a number of years ago, i just stopped installing apps.