April 24 (Bloomberg) — Facebook Inc. has acquired mobile-fitness application Moves, as the social network jumps into the increasingly popular fitness-tracking market.

Moves, which is operated by Finnish company ProtoGeo Oy, makes an app that works on Apple Inc. iOS devices and those that run on Google Inc.'s Android mobile operating system. The app lets people gather data from a smartphone's accelerometer to determine whether a user is walking, running or doing other physical activities. Terms of the deal weren't disclosed.

Facebook has been increasingly assembling a portfolio of mobile properties, including photo-sharing app Instagram and an agreement earlier this year to acquire text messaging app WhatsApp Inc. With Move, the Menlo Park, California-based company now gets a piece of the burgeoning fitness and health app market that companies including Nike Inc. and Fitbit Inc. have explored. Mobile devices are typically always carried around by their users, making them ideal gadgets to gather data and track activity of their owners.