SAN FRANCISCO — Google Maps users will soon be able to broadcast their movements to friends and family via the app – the latest test of how much privacy people are willing to sacrifice in an era of rampant sharing.

The location-monitoring feature will begin rolling out Wednesday in an update to the Google Maps mobile app, which is already installed on most of the world’s smartphones. It will also be available on personal computers.

Google believes the new tool will be a more convenient way for people to let someone know where they are without having to text or call them. The Mountain View, California, company has set up the controls so individuals can decide with whom they want to share their whereabouts and for how long – anywhere from a few minutes to indefinitely.

But location sharing in one of the world’s most popular apps could cause friction in marriages and other relationships if one partner demands to know where the other is at all times. Similar tensions could arise if parents insist their teenagers turn on the location-sharing option before they go out.

Similar tracking is already available on other apps; Glympse, founded by former Microsoft employees, has offered this function for years.

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