GPS Rally Computer vs ES Range
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GPS Rally Computer
This app aids in navigating traditional time-speed-distance (TSD) automobile rallies by simplifying complex computations. It allows for odometer calibration, precise speed tracking, and real-time error correction to help drivers stay on pace.
- Odometer calibration
- Precise speed tracking
- Real-time error correction
- Adjustable clock and distance units
- Customizable speed changes
- Time and distance recording
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GPS Rally Computer is a Universal app designed to simplify computations necessary to navigate a traditional time-speed-distance (TSD) automobile rally. The design and implementation is based on specifications outlined by Clarence Westburg and Rich Bireta, commonly known as the Simple Rally Computer or its acronym SRC. The User's Manual is available on the app detail page linked at http://www.msyapps.com. A TSD rally is comprised of stages set along a route defined by written instructions. The first stage is the Odometer Check stage that allows you to calibrate your car’s odometer with that of the Rally Master’s odometer. In later stages you will follow a course at a particular average speed that will change from time to time at places that are generally unknown in advance. In order to drive the course at the prescribed speeds. Odometer measurement is obtained from Apple’s GPS receiver or third-party devices via Bluetooth. The GPS Rally Computer allows you to do all this and much, much more. For additional documentation, download the User’s Guide. Features of the GPS Rally Computer: - Clock time in either minutes and seconds to tenths of a second or decimal minutes to thousandths of a minute - The clock is a 24-hour clock to simplify computations - Distance measurements in either miles or kilometers to either two- or three-digit precision - One button click to reset default conditions for starting a rally - The internal computer clock can be adjusted to match the official rally clock - The distance between the GPS receiver and the position on the car where the rally measurements are taken (the front wheels, for example) can be added for improved distance precision - A "sprocket" button in the top menu bar allows access to the app settings from within the running application including settings for display of certain items - Calibrate the car's odometer to the official rally odometer on the odometer check stage via a popup - Change average speed (CAST) on a custom popup keypad - Preselect the next CAST to simplify the process of changing speed on each stage and setting CAST to zero for transit zones - As time passes and as the car's odometer is incremented, the actual speed over the course is compared with the expected speed. The difference in seconds or hundredths of a minute is displayed along with an indication to either “Early” or “Late” to stay on pace. - Time errors may be displayed in either of two modes selectable in the app Settings - Pause or Gain time or take a Time Allowance on any leg or within a transit zone - Handle off-course corrections to time and distance with a Reverse button - Record "splits" of time and error at any time with a Split button - Record "control" and reset time error and distance to zero and increment next starting time 5 minutes later (distance and time are modifiable) with a Control button. - Set next starting time for the Next CAST and have the time tick down on the master clock and autostart CAST, or override with a manual button click - Optionally, use a Dual GPS receiver via Bluetooth to supplement or substitute for the Apple internal GPS - Connects to TSD Remote app that serves as a driver's heads-up display connected via local network. Note: Use of the GPS Rally Computer during any particular rally will be subject to the rules and instructions governing the rally and may also define your category or class among race participants. Some rallies may, in fact, prohibit use of this app. This app has been tested with Bluetooth connectivity to a Dual XGPS150A Universal GPS Receiver. Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.
ES Range
Improve your golf game with detailed swing data like smash factor, club speed, and launch angle. Track your progress, play fun games, and utilize video analysis. This app requires a compatible launch monitor.
- Swing data collection (smash factor, speeds, angles)
- Cloud data storage and review
- Accurate yardages with GPS
- In-app video analysis
- Voice recognition for club changes
- Challenging games and modes
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Practice like the pros at your favorite facility. Know your swing data like smash factor, club speed, ball speed, launch angle, spin rate, and distance on every shot. Store your data in the cloud and review/download at your leisure. Get accurate yardages using the Range GPS function. Play fun games and challenges. Use the in-app video feature and MUCH MORE! KNOW YOUR NUMBERS! The Range app includes: Range session data collection Sessions logs to view or send data Club averages for gapping distances Voice recognition allows for easy changing of clubs Video capabilities with voice controls Challenges games GPS Satellite View Note: This is a companion app for the ESB2, ESB1, ES14, ES15 and Patriot Launch Monitors.
Screenshots
Verdict
The clearest difference is price: ES Range at Free against GPS Rally Computer's $24.99. GPS Rally Computer's advantage is rating (3.8 vs 3.4) and iOS requirement (12.4 vs 15.6). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ES Range is free to download; GPS Rally Computer costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
GPS Rally Computer holds the better App Store score, 3.8 against 3.4. Both are backed by a comparable volume of ratings — 5 and 12 respectively.
GPS Rally Computer ships an update monthly, ES Range every 5 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | GPS Rally Computer | ES Range |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 3.8 (5 ratings) — better | 3.4 (12 ratings) |
| Positive reviews | — | 40.0% of reviews |
| Number of ratings | 5 | 12 — better |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 12.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 2 MB | 150 MB |
| Age rating | 4+ | 4+ |
| Developer | MSYapps | Ernest Sports, Inc |
Customer experience
GPS Rally Computer
ES Range
In-app purchases
GPS Rally Computer
No in-app purchases
ES Range
No in-app purchases









