CrashMatrix Pro

About CrashMatrix Pro

NEW: Interactive Diagrams for 16 More Calculators Tap-to-enlarge SVG diagrams now appear in 28+ calculators, showing you exactly what to measure at the scene: Skid Speed & Slide to Stop — see the vehicle and skid marks with distance labels Yaw Mark Speed & Radius of Curve — chord, middle ordinate, and radius clearly illustrated Stopping Distance — color-coded timeline showing P/R and braking phases Air Brake Lag — four-phase timeline: P/R, lag, braking, and stop Grade Adjustment — vehicle on a slope with gravity component arrows Momentum (Inline) — before and after collision with speed arrows Crush Energy — front view with C1-C6 measurement points across the damage PDOF Correction — top-down view showing force angle from centerline Motorcycle Slide — motorcycle on its side with slide distance Night Visibility — headlight beam range vs. stopping distance comparison Rollover Speed — vehicle cross-section with track width and center of gravity Rider Vault — airborne arc plus ground slide phases MC Lean Angle — motorcycle leaning into a curve with angle labeled Grade Crossing — top-down railroad tracks and road intersection NEW: Built-In User Manual A comprehensive guide accessible right from the home screen. Covers all calculator categories, how to use every feature, field tips, and privacy information — written in plain language for officers of all experience levels. NEW: 3 Brake Skid Test Calculator Average drag factors from three test skids at a known speed. Shows individual results plus high, low, and range with warnings for inconsistent tests. NEW: Crash Math Academy Link Quick access to the companion app directly from the home screen footer. All diagrams are completely original illustrations — no external imagery. Every calculation still runs 100% offline on your device.

App privacy

The developer, Brian Watson, reported these privacy practices to Apple.