Diamond Trainer AI vs Reactr

Diamond Trainer turns any iPhone or iPad into a personal baseball & softball performance lab. Record a swing or pitch, and let advanced on‑device vision models break down your movement—frame by frame—into the metrics college and pro coaches watch. Why Athletes & Coaches Love It Instant clarity: No guessing. Get objective “Efficiency” scores for torso, hips, hands/arms and total sequencing. Actionable coaching: Each session produces strengths, top opportunities, and targeted drill recommendations. Pitching or hitting: Switch modes to get discipline‑specific metrics and cues. Fast & automatic: The app intelligently trims dead time, finds the key motion window, and detects dominant side. Privacy first: Processing happens on device—your clips don’t need to leave your phone. Key Metrics (Examples) Hitting: Hip–Shoulder Separation (Sequencing “stretch”) Kinematic Timing (Hands After Hips) Bat Lag Proxy Angle Swing Plane Variance Stance Width Stability Head Stability (Vertical & Lateral) Pitching: Stride Length Ratio (normalized) Lead Foot Stability Near Release Arm Slot at Release Elbow Flexion at MER (Maximum External Rotation) Hip–Shoulder Separation Trunk Tilt at Release Head Stability Shared Timing Events: Foot Plant MER (Maximum External Rotation) Contact / Release (Wrist Peak Event) Smart Efficiency Scoring Diamond Trainer goes beyond “one number.” Subsystem scores (Hands, Hips, Arms, Torso) roll up into an Overall Efficiency score—adaptive to experience level—while factoring data quality so low-confidence clips don’t unfairly punish you. Personalized Drill Engine Each improvement item can unlock a recommended drill (e.g., “Hands-After-Hips Tee Progression” or “Stride Box Drill”), with level‑specific hints (T-Ball → Professional) to keep development age‑appropriate and focused. Data Quality Aware The app detects when: Athlete is too small in frame Lighting or framing reduces pose confidence Frame rate is insufficient around the action You’ll see gentle guidance instead of random low scores. Simple Workflow Record (or import) a clip Select Hitting or Pitching Let analysis run (fast, on-device) Review Efficiency & Subsystem scores Read strengths + top opportunities Add recommended drills to your training plan Re-test and track progress over time Designed For Youth & High School Players seeking structured improvement Collegiate & Travel Program Coaches scaling feedback Private Instructors wanting objective baselines Dedicated athletes tracking off‑season gains Privacy & Performance All biomechanical processing uses Apple’s Vision frameworks locally. No account required to start. No external upload needed for core analysis. EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Know exactly what your hitters are training against. Reactr converts pitching machine speeds into equivalent game speeds — so every rep at practice delivers the reaction time your hitters will actually face in a game. Set a machine speed, set your practice distance, and Reactr instantly shows the game-equivalent velocity and reaction time your hitters are reacting to. Switch to Game Speed mode and work backwards — tell Reactr the game speed you want to simulate and it tells you exactly what to dial into the machine. Used by baseball and softball coaches who want their practice reps to mean something. ——— HOW IT WORKS ——— A pitching machine set to 60 mph at 40 feet doesn't give hitters the same reaction time as a 60 mph game pitch. The distance is different. The math matters. Reactr does the math instantly — so you can stop guessing and start building practices that match the real demands of the game. ——— TWO MODES ——— MACHINE SPEED MODE Know what your machine setting actually simulates. Dial in your machine speed and practice distance. Reactr shows the equivalent game speed, reaction time in milliseconds, and a color-coded difficulty rating. Blue through red — easy to track all the way up to elite velocity. GAME SPEED MODE Work backwards from the game. Set the game speed you want your hitters to train against and your practice distance. Reactr tells you exactly what to set your machine to. Perfect for building progressions that target specific reaction windows. ——— KEY FEATURES ——— EQUIVALENT GAME SPEED See the true game-speed equivalent of any machine setting at any distance. Baseball and softball. Every level of play. REACTION TIME Know exactly how many milliseconds your hitters have to decide and swing. Under 400 ms is elite. Reactr shows you where every rep falls. SPEED COLOR ZONES Blue = Easy to track. Green = Developing challenge. Gold = Competitive speed. Orange = Advanced velocity. Red = Elite. The ring updates live as you adjust. SHARE YOUR SETUP Text your practice configuration to the coach setting up the machine. Machine speed, practice distance, equivalent game speed, and reaction time — one tap, sent. BASEBALL AND SOFTBALL Full support for both sports with separate speed ranges, distance ranges, and game distances. Dial in the official game distance for your specific level of play in Settings. ——— BUILT FOR THE DUGOUT ——— Works completely offline — no WiFi or cellular required No account, no sign-in, no cloud Optimized for iPhone and iPad Portrait and landscape support Free. No trial. No subscription. No catch. ——— WHO IT'S FOR ——— Travel ball coaches. High school programs. College staffs. Batting cage instructors. Anyone running a pitching machine who wants their hitters training at the right reaction speed — not just the right number on the dial. Reactr requires iOS 17 or later. Compatible with iPhone and iPad.