---
title: "GPS Rally Computer — App Overview"
url: https://marlvel.ai/apps/gps-rally-computer
category: Sports
developer: MSYapps
platforms: ios
rating: 3.8 (5 ratings)
pricing: paid
report_level: overview
generated: 2026-04-27
last_verified: "2026-04-27T08:30:01.619Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** This is a niche utility app that digitizes traditional TSD rally navigation methods using standardized SRC logic.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Sports |
| Rating | 3.8 ★ (5) |
| Pricing | paid |
| Platforms | iOS |
| Latest Version (iOS) | 5.3.1 |
| Developer | MSYapps |

<!-- SECTION: Summary -->
## What is GPS Rally Computer?

GPS Rally Computer is a specialized tool designed for participants of time-speed-distance (TSD) automobile rallies. It automates complex navigation calculations based on the Simple Rally Computer (SRC) specifications established by Clarence Westburg and Rich Bireta. The app integrates with Apple’s internal GPS or external Bluetooth receivers to provide real-time odometer measurements.

<!-- SECTION: Key Features -->
## Key Features

- **SRC Calculation Engine**: Performs rally computations based on the established Simple Rally Computer specifications.
- **Odometer Calibration**: Includes a dedicated stage to calibrate the user's vehicle odometer against the Rally Master’s measurements.
- **GPS Integration**: Supports distance measurement via Apple’s built-in GPS or third-party Bluetooth-enabled devices.
- **Dynamic Speed Tracking**: Allows users to maintain prescribed average speeds throughout rally stages with varying speed requirements.

<!-- SECTION: Target Audience -->
## Who is it for?

Automobile rally enthusiasts and navigators participating in TSD rally events.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/gps-rally-computer/id1210193950?uo=4)
- [Full Intelligence Report](https://marlvel.ai/apps/gps-rally-computer)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/gps-rally-computer).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*