Under Armour has acquired fitness apps MyFitnessPal and Endomondo for a combined $560 million

MyFitnessPal, a social fitness app that allows you to log calories, record exercise, and compete with your Facebook friends to lose weight, has helped millions of users get more fit.

Endomondo, like MyFitnessPal, is also a social fitness network. The Endomondo Sports Tracker mobile app lets people track workouts, analyze their performance, and stay connected while acting as a personal trainer for your smartphone. The app has racked up 20 million registered users around the globe since its founding in 2007.

"Under Armour's demonstrated global leadership in health and fitness innovation is greatly enhanced with the addition of Endomondo and MyFitnessPal, as we continue to redefine and elevate the Connected Fitness experience for millions of people around the world," says Kevin Plank, Chairman and CEO of Under Armour.

In December 2013, MyFitnessPal acquired Austin-based MapMyFitness and since then has been intently focused on creating "the largest connected fitness platform." The app now reaches over 80 million registered users.

The popular Nike+ app reached only 18 million users when the company last released numbers in 2013.

"MyFitnessPal is the leading free resource for achieving and maintaining health and fitness goals, providing nutritional information for over five million foods and offering caloric data associated with hundreds of exercises, empowering its community to make better, more informed healthy-living decisions," Under Armor announced in its quarterly result.