Garmin has announced a new fitness app for Android and iPhone mobiles called Garmin Fit, which makes use of its GPS expertise by bringing a wealth of functionality to the user and could challenge the popular Nike+ format.

The sports app allows a variety of track metrics to be captured and fed back, including speed, pace, distance, time, calories and with the help of Garmin accessories displays heart rate and cadence.

There is also an online data bank called Garmin Connect allowing for users to quickly and easily log their workouts, track their totals, set goals, share workouts with friends and family and participate in an online fitness community.

As well as this the Connect service will show off information by way of charts, illustrations, reports and a variety of map representations including street, photo, topographic, and elevation maps; making for an easily digestible way of taking in workout info.

"Garmin Fit is the ideal solution for users who are new to the fitness tracking landscape and for those looking to stay totally connected," said Dan Bartel, Garmin’s vice president of worldwide sales. "To be able to utilize Garmin’s powerful fitness accessories with the same device that plays music, makes calls and uploads workouts automatically to share and analyze, makes Garmin Fit a must have app."

There's also a new ANT+ adapter for iPhone, allowing users to use their Garmin ANT+ accessories with their iPhone to display a whole host of extra info - this will cost $49.99. No pricing on the app itself yet, but we'll let you know when we find out.

Nike+ or Garmin Fit? Let us know in the comments...