Build A Fitness


The Under Armour
Connected Fitness Platform

Join our mission to make all athletes better with the technology to train, perform, and achieve greatness. With over 30 million users, our platform is ready to help you ignite a fitness revolution.

Technology for All Athletes

Our platform supports a full suite of APIs that help you track, inspire, and engage your user base. From all-day tracking to workouts to supporting hundreds of devices, our inherently social platform helps you build applications that deliver both performance and fun.

24/7 Tracking

24/7 activity tracking with steps, sleep, distance, weight, and more


700+ unique activities to log and record with routes and mapping


A vibrant community of connected athletes, friends, and peers


Data from 400+ activity devices from industry-leading brands

Get Started

Start building today with our API. Our Starter tier is absolutely free, and allows for up to 100k calls per day and 25 requests per second. Ready to scale? Contact us for pricing.


RESTful interfaces.