# CrashMatrix Pro — Crash Reconstruction Tools

> Crash Reconstruction Tools (iPhone/iPad app by Brian Watson.)

- Source: https://appshunter.io/ios/app/crashmatrix-pro/id6759350438 (this page in markdown: same URL + `.md`)
- Developer: [Brian Watson](https://appshunter.io/developer/1878233504)
- Category: Utilities, Education
- Price: $9.99
- Age rating: 4+
- Requires: iOS 15.1 · 38 MB
- Languages: American English
- Released: 2026-02-20
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/crashmatrix-pro/id6759350438/reviews.md

## What is CrashMatrix Pro?

CrashMatrix Pro puts the power of advanced collision analysis in your pocket. Built by a veteran law enforcement professional with 35+ years of experience, this app delivers 37+ industry-standard calculators used in traffic crash reconstruction.

SPEED ANALYSIS

Speed from Skid Marks
Slide to Stop
Combined Speed
Critical Speed Yaw
Vault / Flip
Speed from Fall
Multi-Surface Speed
INTERMEDIATE TOOLS

Time & Distance
Perception-Reaction Distance
Stopping Distance
Acceleration / Deceleration
Grade Adjustment
Drag Factor
Kinetic Energy
ADVANCED ANALYSIS

Momentum (Inline & 360 Vector)
Delta-V
Crush Energy
Coefficient of Restitution
Law of Cosines
Closing Speed
RECONSTRUCTION SPECIALTIES

Motorcycle Slide
Rider Vault
Wheelbase Reduction
Truck/Trailer Momentum
Trailer Braking
Rollover Speed
Pedestrian Speed
Bicycle Speed
And more
ADDITIONAL FEATURES

Complete Formula Reference Cards with worked examples
Unit Converter (Feet/Inches, MPH/FPS)
Imperial and Metric toggle on every calculator
Step-by-step completed formulas shown with every calculation
Common drag factor and braking efficiency reference tables
Works 100% offline — no internet required
Designed for law enforcement officers, accident reconstructionist, insurance investigators, and forensic engineers who need accurate, reliable calculations in the field.

One-time purchase. No subscriptions. No ads. No data collection.

## Chart rankings

- #197 in Top Paid · Utilities (US App Store)


## Version history (last 3 releases)

### 1.2.0 — 2026-02-27

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.

### 1.1.0 — 2026-02-23

E-Scooter Pitchover Calculator — New tool for e-scooter crash reconstruction with Pitchover and Slide Only modes, airborne formula comparison, and real-world worked example.


Law of Cosines — Crash Scene Diagram — New interactive road diagram showing A-B-C triangle for vehicle departure scenarios with departure angle worked example.


Pedestrian Air+Slide — Airborne Formula Comparison — Added vault, flip, fall, and minimum speed angle calculations.


Accel/Decel Calculator — Expanded to 6 Modes — Added time-based Find f, Find V2, and Find Time modes.


Speed from Skid — Find Distance Mode — Calculate skid-to-stop distance from known speed.


Time & Distance — V=d/T Mode — Find speed from distance and time.


Vault Speed — Lower/Higher Landing Toggle — Support for landing above launch point.


Rise & Run Calculator — New tool for calculating road grade from level and rise measurements.


Height of Object Calculator — New tool for calculating object height from distance and angle.


Diagram Viewer — Tap to Enlarge — All SVG diagrams now support tap-to-enlarge with Fullscreen modal.

Formula Reference Cards — Added cards for Speed from Skid (Find Distance), Unknown Take-Off Angle, Rise & Run, and E-Scooter values.


Motorcycle Wheelbase Reduction — Modified Eubanks method for motorcycle impact speed.


Various bug fixes and improvements

### 1.0 — 2026-02-20

No release notes.

## More apps by Brian Watson

- [Crash Math Academy](https://appshunter.io/ios/app/crash-math-academy/id6759629050)

All apps by Brian Watson: https://appshunter.io/developer/1878233504

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*