TSD Rally Computer vs ES Range
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TSD Rally Computer
This app assists in navigating traditional time-speed-distance automobile rallies that require manual odometer entry. It simplifies complex calculations, allowing drivers to accurately track their progress and maintain the required speeds. Features include customizable time and distance measurements, odometer calibration, and real-time speed comparisons.
- Manual odometer entry for TSD rallies
- Odometer calibration
- Customizable time and distance units
- Real-time speed comparison with 'Speed Up'/'Slow Down' indicators
- MFi controller support
- Adjustable internal clock
- Preselect next speed changes
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TSD Rally Computer is an iPad app designed to simplify computations necessary to navigate a traditional time-speed-distance (TSD) automobile rally that requires manual entry of odometer distance. 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 Rallymaster’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, you must keep track of your odometer reading along the way. You may get the odometer measurement from any external GPS or odometer or app you like. Apple-approved MFi game controllers can be used with the TSD Rally Computer when connected via Bluetooth. The TSD Rally Computer allows you to do all this and much, much more. For additional documentation, download the User’s Guide. Features of the TSD 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 - One button click to reset default conditions for starting a rally - The internal iPad clock can be adjusted to match the official rally clock - The car's odometer reads up to 99.99 miles or kilometers and can be incremented by simple button clicks including buttons to increment by one of four amounts shown in the selector below the odometer. The optional amounts are 1.00, 0.50, 0.10, and 0.01 - A "Settings" 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) with a scroll wheel and make incremental changes with either of two buttons - Preselect the next CAST to simplify the process of changing speed on each leg - The CAST button can be deactivated to prevent accidental touching - Preset CAST speeds and times to travel one mile or kilometer at those speeds with via a popup - Use scroll wheels to quickly and easily change time, speed, or distance throughout the app - 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 "Speed Up" or "Slow Down" to stay on pace - Pause or gain time on any leg with a toggle button and at times chosen with scroll wheels - Handle off-course corrections to time and distance with a toggle button - Record "splits" of time and error at any time with a Control button - Set Next Departure Time (NDT) and have the time tick down on the master clock and autostart CAST - Use a handy popup to perform ad hoc computations of time, speed, and distance given any other two variables - TSD Remote is a companion heads-up display app for the driver that synchs information with the navigator's TSD Rally Computer - Apple-approved game controllers are supported via Bluetooth - A pair of stopwatches with pause and split times may be operated at any time. You may toggle between each stopwatch with the touch of a button. Note: Use of the TSD 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.
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 ES14, ESB1 and Patriot Launch Monitors.
Screenshots
Verdict
The clearest difference is price: ES Range at Free against TSD Rally Computer's $24.99. ES Range also leads on rating (3.4 vs 2.0) and review sentiment (40% vs 0%). On 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; TSD Rally Computer costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ES Range holds the better App Store score, 3.4 against 2.0. That said, the two scores are not equally well evidenced: ES Range has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of TSD Rally Computer's written reviews are positive against 40% of ES Range's.
TSD Rally Computer ships an update every 3 months, ES Range monthly. The most recent releases landed on September 16, 2026 and September 30, 2026 respectively.
| Parameter | TSD Rally Computer | ES Range |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 2.0 (2 ratings) | 3.4 (12 ratings) — better |
| Positive reviews | 0.0% of reviews | 40.0% of reviews — better |
| Number of ratings | 2 | 12 — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | MSYapps | Ernest Sports, Inc |
Customer experience
TSD Rally Computer
ES Range
In-app purchases
TSD Rally Computer
No in-app purchases
ES Range
No in-app purchases









