iFour Core App

Develop the strongest core imaginable without injury.

Every individual’s anatomy is different which is why we have designed a customizable, physical therapy approved core program. Each workout is under 10 minutes, is suitable for all fitness levels, and can take place in a home or at a gym.

Google Play
Apple App Store
Mobile fitness app interface showing stacked screens with sections labeled Getting Started, Test, Workout, and Connect
Getting Started Are you ready to build the core of your dreams? Get started with our introductory video to see how iFour Core can help.



Test
Learn at your own pace. Take the fitness test and as you get stronger, unlock more core exercises for a more advanced program.



Workout
With more than 300 unique core exercises, iFour Core customizes your daily workout program based on your current level of core strength.



Connect
Connect with us on social media for more videos and great content, or reach out for additional support.
Fitness app home screen showing sections for test, workout, and connect
Workout overview screen in a fitness app showing duration, number of exercises, and start button
Fitness test results screen displaying completed exercises and performance levels
Fitness app setup screen showing equipment selection options
Exercise instruction screen demonstrating proper plank form in a gym setting
Exercise list screen in a fitness app showing multiple core exercises and durations
Fitness test review screen showing completed test details and exercise breakdown

iFour Core adapts as you progress.

iFour Core uses assessment-based training to create a core program that evolves with you and grows as you do.

How it works
You complete a short fitness test to establish your baseline. From there, workouts are customized daily based on your performance and strength level, adjusting as you improve.

What makes it different
This isn’t a fixed program or a one-size-fits-all plan. iFour Core recalculates continuously, guiding you forward with structure and intention.

Inside iFour Core

  • Personalized core training
  • Adaptive progression
  • Designed for longevity

BoOk Jill

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