Coach Mulligan
AI Golf Coach — In Your Sim & On the Course
Who He Is
Coach Mulligan is an AI coach modeled on the style of a veteran golf instructor — the kind of teacher who's as comfortable with beginners who can't hit the broad side of a barn as with single-digit players chasing scratch. He's built around one hard-won lesson-tee truth: the fix is almost never what the golfer thinks it is.
His style is patient and unhurried. He doesn't rush to fill silence. He listens more than he talks, and when he does speak, he keeps it short and makes it count. He's warm but not soft. He'll tell you the truth, but he'll do it in a way that makes you want to come back tomorrow.
How He Coaches
Mulligan leads with feel, observation, and the right question at the right time. The numbers are there when they help make a point. They're not the point.
- One thing at a time. He gives you one change, one drill, one feel. Not three things that compete for your attention.
- He remembers. Past sessions, drills you've worked on, breakthroughs you've had. He brings them up when they matter — what you worked on last time, the fault that keeps showing up, and the drills you've logged.
- He reads the room. When you're frustrated, he encourages you to stay with it. When it's really getting to you, he drops the mechanics entirely and suggests a breather or a few easy swings. When things are clicking, he tells you so and lets you keep working.
- He asks questions. "What did that one feel like?" and "Did that one feel any different?" — he coaches by drawing out awareness, not just dispensing information.
- Dry humor, sparingly. The kind that makes you smile after a good one, without derailing the lesson. "More of those and I'll be out of a job."
Teaching Philosophy
Coach Mulligan's coaching is grounded in biomechanics-based coaching methodology. Drills reference expert coaching — not social media influencer content.
He has deep biomechanical knowledge, but he doesn't lead with it. He leads with observation and feel. Numbers support his point. They are not his point.
5-Phase Coaching Curriculum
Coach Mulligan guides you through a structured progression. Each phase focuses on specific mechanics with metric-based graduation requirements:
Phase 1: Setup
Posture, spine tilt, knee flex, shoulder alignment at address. Getting the setup right is foundational — poor setup propagates through the entire swing.
Phase 2: Rotation
Hip turn, shoulder turn, X-factor separation. The gap between shoulder and hip rotation is one of the strongest correlates of clubhead speed.
Phase 3: Timing
Backswing-to-downswing tempo rhythm. Expert-level swings average a 3:1 ratio. Deviations indicate rushing or casting.
Phase 4: Sequence
Correct firing order: hips → shoulders → arms. Most amateurs fire arms before hips ("over the top"), which Coach Mulligan identifies and corrects.
Phase 5: Scoring
Lag retention into the downswing. Expert-level swings maintain 90°+ at the halfway-down position. Losing lag early costs distance and consistency.
What He Measures
Coach Mulligan's coaching is grounded in real swing data. On the desktop platform, that means AI vision tracking every joint through your swing: over 20 swing metrics from the face-on camera, plus 6 rotation and alignment metrics from an optional overhead camera. On iPhone, he tracks spine tilt, knee flex, hip and shoulder turn, X-factor, tempo, sequence, lag, wrist bow, and head sway. Either way, he coaches the same fundamentals:
- Setup: spine tilt, knee flex, plus shoulder alignment and stance width (desktop)
- Rotation: hip turn, shoulder turn, X-factor separation
- Timing: tempo ratio, kinematic sequence (correct firing order)
- Power: lag angle, wrist bow, plus release timing (desktop)
- Stability: head sway, plus posture maintenance through the swing (desktop)
- Overhead (desktop): hip and shoulder rotation from above, X-factor, stance alignment, ball position
Each metric is compared against the targets for your level, so Mulligan can show you where you stand and what to work on next. He also tracks fatigue across a session and tells you when your mechanics start breaking down; on iPhone, a high heart rate from your Apple Watch counts too.
Root-Cause Diagnosis
When something's off, Mulligan doesn't just name the symptom — he digs into why. Not enough hip turn? If your head also slid sideways, he'll tell you the cause looks like sliding instead of turning, and he checks other faults against your related numbers the same way. He tells you the one fault to fix first, lists the others in priority order for you to read, and gives you a drill for it when there is one.
Two Training Modes Desktop iPhone
Standard Training
Encouraging and forgiving. A few bad swings won't hold you back. Designed for beginners, casual practice, and general improvement.
Advanced Training
Data-driven and demanding. Graduation requires consistency, not just capability — you need to reproduce good mechanics swing after swing. Designed for serious practice and competitive preparation.
Two Ways to Get Coached (Desktop)
On the desktop platform, use Ask Coach for on-demand swing and session reviews with cameras alone, or connect a launch monitor through GSPro for Live Coaching after every shot. Both feed the same 5-phase curriculum and the same coaching memory of your recent sessions. See how Ask Coach and Live Coaching work.
Where Mulligan Lives
- Desktop: AI vision that tracks every joint through your swing for up to 30+ measurements, depending on your camera setup, key frames of every swing (address, top, impact, and finish) shown next to your analysis, predictive coaching that flags compensation patterns and early fatigue within a session, and the structured curriculum. The full coaching experience in your sim bay, running locally on your PC. Multi-camera depth metrics In development
- Mobile: Voice-driven caddie on the course through AirPods, club recommendations from your actual bag, range mode swing analysis with real-time metrics, analytics dashboard with trend charts, 5-phase coaching plan with graduation tracking, and fatigue detection. Everything runs on-device — no internet required. The iPhone app requires a subscription after a 14-day free trial.
Multi-camera depth metrics are being validated and will arrive as a free 1.x update for v1 owners.
Desktop and iPhone are separate purchases.