The Science Behind Everything.
AFS® is the comprehensive science of human movement developed over 45 years by Gray Institute®. It unifies physical, biological, and behavioral science into one framework — and this app puts it to work every day.
Physical Science
The body doesn't just move — it reacts to its environment. Gravity, ground reaction force, and momentum fill every movement pattern. AFS® teaches you to harness these forces rather than fight them.
Biological Science
Every joint, muscle, and chain moves in three planes simultaneously. 3DMAPS® gives you a system to assess all three, find the driver, and build from there.
Behavioral Science
AFS® treats the individual — their unique history, biology, and ambitions — as the center of every program. No two clients. No two solutions.
The result? A principle-based system that lets you design a limitless number of individualized assessments, treatments, and training programs. No one-size-fits-all. No plateaus. Just outcomes — for every patient and client, every time.
Learn AFS® at Gray Institute® →Your Practice. Transformed.
Three Steps.
Designed for the professional who doesn't have time to waste. Start immediately, see results the same day.
Download & Start Free
30 days. Full access. No payment required. Every professional tool — 3DMAPS® screening, 300+ AFS® templates, client management, and Vitality App connection. Cancel anytime.
Invite Your Clients
Connect the Vitality® Client App in seconds. Your clients download their free app — you assign programs, track progress, and stay connected between sessions. One ecosystem, fully integrated.
Build & Assign
Pull from 300+ AFS® templates or build your own. Assign programs in seconds. Track completion. Every session informed by 3DMAPS®. Every program grounded in science.
Everything You Need.
Nothing You Don't.
Built for the working clinician, coach, and trainer — not for data entry.
3DMAPS® Screening
Full tri-planar movement assessment built into the app. Screen, score, and identify the driver — all from your phone.
300+ AFS® Templates
Filter by chain, plane, and driver. Every template grounded in Applied Functional Science®. Fully customizable.
Client Management
Add clients, assign programs, track completion. Manage your full roster from one clean dashboard.
Movement Locator
Find the right exercise for any client in seconds. Filter by body region, plane, and function.
Vitality® Client App
Your clients get their own free app. You assign — they follow along. Seamless connection between sessions.
Web App Included
Full access via browser at gi.grayinstitute.app. Works on desktop, tablet, or phone.
The Vitality®
Client App.
Your clients get their own free app — powered by your expertise. Assign programs, they follow. Track goals, celebrate wins. The connection between sessions has never been tighter.
- ✓Free for every one of your clients — no extra cost
- ✓Programs assigned instantly from your GI Mobile App
- ✓6 Vitality Pillars: Movement, Fuel, Sleep, Resilience, Enhancers, Community
- ✓Downloadable 6 Pillar Guidebooks — free for clients
- ✓Goal tracking and progress visibility between sessions
The App Is the Tool.
The Education Is the System.
The GI Mobile App works best for those trained in Applied Functional Science®. Deepen your expertise through Gray Institute's world-class programs.
3DMAPS® Certification
Master the tri-planar movement assessment system used in the GI Mobile App.
Learn 3DMAPS® →CAFS® Certification
Chain Reaction Biomechanics — understand how movement chains drive function and dysfunction.
Learn CAFS® →GI Membership
Access all Gray Institute® courses, live events, and a growing library of AFS® content.
Explore Membership →GIFT® Mentorship
Gray Institute Fellowship Training — advanced mentorship for practitioners ready to go deep.
Explore GIFT® →