On an iPhone, go to Settings, then Privacy, then Location Services. Conveniently, Apple gives iOS users the option to choose between Never, Always, and While Using the App—the last choice is a good compromise. (Thus, it's nice that you can set Uber to "While Using.") Do you dislike that Google Maps can figure out where you are? You can choose “Never” as an option for that app, but then when you fire up Google Maps, you’ll notice that it can’t localize you. (Which means that searching for “coffee” could return results that aren’t nearby.) Even if you’ve turned off Location History in your Google account, you should still check out what app-level permissions you’re giving to Google apps and others in your settings.