It already uses mapping technology and a loud emergency service siren to alert the user.

The devices, used by seven million people over the past decade, alert the user when to go to the ride where they can hop on without waiting.

Users could also view their player tracker, which would alert the user when a player in their chosen player list was active in a game.

Network monitors (also known as reverse-firewalls) can be used to alert the user whenever an application attempts to make a network connection.

If any fall below a certain threshold, the app alerts the user that supplies are running low.