PROSwing

ProSwing - Baseball Swing Analysis App & AI Hitting Coach

ProSwing - Baseball Swing Analysis App & AI Hitting Coach

Turn any phone or webcam into a swing analysis lab. No sensors. No expensive hardware. 100% Local and Private. Compare your swing against baseball's greatest!

Free mobile baseball video analysis — start tracking your swing in seconds.

Drop video or click to upload

Supports MP4, MOV, AVI, JPG, PNG, WebP up to 500MB

High-Speed Analysis

Frame-by-frame breakdown at 240fps equivalent

AI Baseball Hitting Coach

Automated biomechanical feedback powered by MediaPipe skeleton tracking

Pitch Swing Synchronization Software

Multi-dimensional tracking maps your bat path against incoming pitch profiles

How PROSwing Analyzes Your Swing

Professional-grade analysis based on biomechanical research

Core Swing Matrix
Load0–25%
Contact

The wind-up — weight shifts to the back leg, hands set, eyes lock on the pitcher.

Head StabilityWeight: 20%

Target: < 2 inches drift

Head Stability — Keeping your head still so your eyes track the pitch

Think of your head as a camera on a tripod. Any drift blurs the picture. Keep your chin level and let your eyes do the work — you'll pick up spin and location earlier.

Launch25–50%
Power

The trigger — stride begins, hips fire first, hands stay back to create torque.

Hip-Shoulder SeparationWeight: 20%

Target: 45–55°

Kinematic Sequence — The chain of energy transfer — pelvis → trunk → arms → bat
Trunk Vector — A directional line from hip to shoulder measuring upper-body rotation
Pelvic Angular Velocity — How fast your hips rotate — elite hitters peak at ~600°/s

This is where power is born. Feel your belt buckle start rotating toward the pitcher while your hands stay back — that stretch across your core is the elastic energy that turns into bat speed. The more separation, the more whip.

Contact50–75%
Efficiency

The collision — bat meets ball, body position determines outcome quality.

Bat SpeedWeight: 20%

Target: 65–75+ mph

Attack Angle — Vertical bat path angle — optimal is −6° to +6°
xContact Probability — Modeled % predicting quality contact vs. pitch type
Squared-Up Rate — How squarely bat meets ball — higher = harder hits

At impact, your body should feel like a coiled spring releasing. Your hands drive through the zone on a slightly upward plane that matches the pitch's downward angle. Focus on meeting the ball out front — that's where barrel control lives.

Follow-Through75–100%
Power

The finish — full extension, balanced deceleration, evidence of efficient energy transfer.

Lead Arm AngleWeight: 15%

Target: 160–180°

Lead Arm Angle — Front arm extension at contact — optimal is 160–180°
Back Elbow Position — The 'Power L' shape of your trailing arm — keeps the swing compact

A long, balanced finish tells you the swing was efficient. If you're falling off the plate or cutting short, you leaked energy somewhere. Let the bat wrap naturally around your back — your body knows when the swing was right.

How Swings Are Scored

Each metric is scored 0-100, then combined using weighted averages into an overall grade.

A+95-100
A90-94
B80-89
C70-79
D60-69
F< 60
Example Score CalculationA - 92/100
Head Stability
9520%
Attack Angle
8815%
Hip-Shoulder Sep.
9220%
Bat Speed
9020%
Lead Arm Angle
9415%
Back Elbow
9110%

Compare Against the Best

See how your metrics stack up against MLB's elite hitters

Ken Griffey Jr.

SEA · Historical Power/Speed

Historical Power+Speed
Bat Speed76.5 mph
Swing7.5-8.3 ft
Attack13°-16°
Squared38%

Iconic lefty swing with effortless power and exceptional hand-eye coordination. Widely regarded as the most mechanically pure swing in baseball history.

Trea Turner

PHI · Speed-First Compact

Speed
Bat Speed68.2 mph
Swing5.5-6.3 ft
Attack7°-10°
Squared37.8%

Elite speed paired with an ultra-compact swing. Maximizes contact and baserunning value through quick hands and efficient bat path.

Amateur Baseline

REF · User Reference Profile

User Reference
Bat Speed52 mph
Swing6.5-7.8 ft
Attack4°-12°
Squared22%

Optimized for mobile-grade video capturing. Accounts for YOLOv8-pose 17-point structural constraints, motion blur, and perspective distortion.

Luis Arraez

SD · Contact Outlier

Contact
Bat Speed62.4 mph
Swing4.4-5.9 ft
Attack6°-8°
Squared43.7%

Ultimate contact baseline. Shortest swing path in Major League Baseball, maximizing barrel control to offset low raw velocity.

Ready to see your swing score?

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ProSwing AI: Computer Vision Baseball Swing Analyzer & AI Hitting Coach

ProSwing AI is a mobile 3D pose tracking app for baseball hitters that analyzes swing mechanics using smartphone computer vision. It requires zero hardware bat sensors, tracks full-body biomechanics, and delivers automated fault detection with personalized corrective drills — all from your phone camera.

How ProSwing AI Analyzes Your Baseball Swing (No Hardware Required)

1. Mobile Capture: High-FPS Phone Camera & 3D Pose Detection

Record your swing with any smartphone camera. ProSwing AI uses MediaPipe Pose Detection to track 33 body joint landmarks in real-time at 30+ FPS via WebAssembly. No special lighting, tripods, or calibration needed — just point your phone and swing.

2. Biomechanical Audit: Kinematic Chain & Load-to-Impact Breakdown

The engine calculates the kinematic sequence — measuring rotational velocity transfer from pelvis through trunk to upper body. It captures hip-shoulder separation via vector dot product, pelvic angular velocity with 5-frame moving average filtering, and attack angle through lead arm atan2 computation.

3. Personalization: Automated Fault Detection & Corrective Drills

ProSwing AI automatically identifies mechanical flaws — casting, early extension, sway, lunging, and hand drop — then matches each with a personalized video drill. Your hitting coach is your phone, powered by biomechanical analysis calibrated against MLB average Statcast data.

Core Hitting Metrics & Mechanical Flaws Tracked

Stance, Load, and Hip-Shoulder Separation

Tracks your pre-swing setup alignment, load timing, and the angular difference between pelvic and shoulder rotation — the "X-Factor" that drives rotational power. Elite hitters generate 45–55° of separation at foot plant.

Bat Path, Attack Angle, and Time to Contact

Measures the vertical angle of your bat path through the hitting zone (optimal: −6° to +6°), swing plane consistency, and the duration from launch to contact point. SLAP (Swing Length Above Predicted) quantifies how far your path deviates from optimal.

Weight Transfer, Posture Stability, and Follow-Through

Evaluates how efficiently your weight shifts from back to front leg, maintains upright posture through rotation, and finishes with balanced follow-through. Tracks lead arm extension angle (optimal: 160–180°) and back elbow "Power L" position.

ProSwing AI vs. Bat Knob Sensors vs. VR Training Systems

Feature / CapabilityProSwing AIHardware Bat Sensors
(e.g., Blast Motion)		Standard Video Apps
(e.g., V1 Sports)
Required HardwareSmartphone OnlyKnob Attachment ($150+)Smartphone Only
Setup TimeUnder 10 SecondsSensor Pairing RequiredManual Video Capture
Body Biomechanics TrackingFull-Body 3D Skeleton (Hips, Shoulders, Spine)Bat Metrics OnlyManual Drawing Lines Only
Fault IdentificationAutomated (Casting, Sway, Early Extension)Out-of-Range Metric AlertManual Coach Inspection
Instant Drill MatchingYes (AI-Assigned)Basic Video ListNo

Frequently Asked Questions About AI Baseball Swing Analysis

Do I need a sensor attached to my baseball bat to use ProSwing AI?+
No. ProSwing AI uses your smartphone camera and computer vision to analyze your baseball swing. It tracks 33 body joint landmarks in 3D without any bat knob sensors, launch monitors, or external hardware. Simply record your swing with your phone camera and the AI handles the rest.
Which mechanical flaws in a baseball swing can ProSwing AI detect?+
ProSwing AI automatically detects and matches corrective drills for: casting (early arm extension), early extension (premature hip thrust toward the plate), sway (lateral weight shift away from target), lunging (weight transfers too early), hand drop (bat path drops below optimal plane), and poor hip-shoulder separation. Each flaw is flagged with severity and paired with a personalized video drill.
How does the 3D pose tracking work without sensors?+
ProSwing AI uses MediaPipe Pose Detection to track 33 body joint landmarks in real-time at 30+ FPS via WebAssembly. The engine captures keypoint coordinates for the shoulders, elbows, wrists, hips, knees, and ankles through every frame of your swing. These coordinates feed into a biomechanical computation pipeline that calculates the kinematic sequence and measures rotational velocity transfer from pelvis through trunk to upper body.
What baseball swing metrics does ProSwing AI analyze?+
ProSwing AI tracks 12 key mechanical metrics: stance alignment, load timing, hip-shoulder separation angle, bat path consistency, attack angle, time to contact, weight transfer efficiency, posture stability, follow-through balance, pelvic angular velocity, bat speed estimation, and hand path efficiency. Each metric is compared against MLB-level benchmarks.
Is ProSwing AI free to use?+
Yes. ProSwing AI is free to download and includes 5 free swing analyses. No subscription is required to get started. The app runs entirely in your browser or on your mobile device with zero data uploads to external servers.