Fitness simplified.

A free trainer in your pocket.

Available on iOS

Progress faster

Flex's algorithms automatically adjust your program, helping you achieve your goals faster. The app does all the thinking so that you can just focus on your workouts.

Designed for gym and home.

For all your fitness goals.

Stay active, see progress

Flex helps you stay consistent. We'll schedule your workouts for you and even notify you when it’s time to workout. See your progress charted over time.

Find or create your workouts

Explore our optimal programs and workouts for each fitness goal. Don't be limited to what we offer, it's easy to build or migrate your own program onto Flex.

Pro-level workout editor

Available on iOS