Comparison

ChronoMaster vs GPS Rally Odometer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ChronoMaster

This app is designed for classic car rally pilots and co-pilots to precisely navigate complex special stages. It offers 1/100s second accuracy for timing and distance, with a graphical interface to manage interlaced stages, average speed controls, and countdown timers.

Highlights
  • 1/100s second precision timing
  • Graphical interface for complex stages
  • Acoustic countdown timer
  • Automatic average speed calculation
  • Transfer stage data from roadbook
  • Bilingual interface (English/German)
Features
Read full description

A must have for the serious classic car rallye pilot & co-pilot with a passion to win. Classic car rallies are usually conducted as regularity rallies with so called "Special Stages" which require the pilot to drive a specific distance in a predefined time. Simple Special Stages comprise of just one sector (e.g. 100 meters in 10 seconds). However more serious rallies such as the Mille Miglia require you to master sets of complex, interlaced Special Stages or to maintain a predefined average speed across a stage. ChronoMaster lets you master even the most complicated special-stages of a classic car rallye with ease and 1/100s of a second precision. Don’t get distracted by confusing interlaced stages, secret average speed controls, light-barriers and tubes. ChronoMaster does what most expensive rallye-computers promise – at a fraction of the cost! And it is more intuitive to use on the iPad’s large & bright screen with a full graphical interface. - Transfer all data of a day’s special stages from the roadbook to the iPad before the rallye starts - Easy to use graphical interface to enter special stage data (time, distance, average speed) - Full graphical representation of special stage, including individual/interlaced sectors, light-barriers, tubes - Select the special stage from a list – and off you go! - Up to 15 sectors/special stage - Unlimited number of special stages - Acoustic countdown timer for last 10 seconds of special stage/sector (earphone recommended for driver) - Displays most important information during special stage: time to go, distance from start, distance to finish, average speed of stage/sector - Automatically calculates average speed based on stage-distance/time - No more stopwatch or average-speed tables required - Simple interface lets you concentrate on navigation and precision driving - Sector target time can be input with up to 1/10sec accuracy (e.g. 21.3 sec) - Maximum distance of a special stage is 99.999km - Zero-sync - start multiple sectors of a special stage at once - Start-buttons can be adjusted for left/righthand use (To use start-buttons most precisely during rallying on bumpy roads, place your thumb on the start button, hold it and release button upon start) - Bilingual user interface (English/German) Good luck and most of success with your next classic rallye! ==== Version History ==== v 1.3 NEW: Start-beep does now allow acoustic control of the start which will result in even higher precision during Special Stages. v 1.2 NEW: Up to 15 sectors/stage NEW: Larger digits in the countdown-timer for better usability NEW: English Version NEW: ChronoMaster's functionality is independent of units (kilometers/miles) - although it currently only displays metric units (km/m) just input Special Stage distances in miles as indicated in the roadbook (e.g. 3.7 miles), disregard the displayed "km" unit - and off you go! v 1.1 NEW: Sector target time can input now with 1/10sec accuracy (e.g. 21.3 sec) NEW: Maximum distance of a special stage now 99.999km NEW: Zero-sync - start multiple sectors at once

About

GPS Rally Odometer

This application precisely tracks time, speed, and distance for automobile rallies. It allows for detailed segment measurements, on-map plotting, and real-time adjustments for off-course travel or GPS inaccuracies.

Highlights
  • Time, speed, and distance tracking
  • Stage and checkpoint measurements
  • On-map plotting of rally path
  • Adjustable distance units (miles/km)
  • Off-course distance subtraction
  • GPS coordinate adjustment
  • Time adjustments for stages
Features
Read full description

This app is designed for various types of automobile rallies that require measurement of time, speed, or distance between segments of the rally route including stages and checkpoints. To make sure that all initial conditions are set properly when using GPS, touch the "Reset/Pause" button and choose the "Reset, New Rally" option. Also, it is important to allow Apple's internal GPS time to determine the current location and to begin interacting with the app by driving around a bit before you start using the app on a rally course. Begin computing distance, time, and speed by touching the "Start Rally" button. Alternatively, when the app has been either restarted to zero distance or paused, you may select a minute for the "Next Starting Time." GPS inputs trace the path along the rally route. From time to time you may measure time, speed, and distance for a stage or a checkpoint. These measurements will be stored in a table and the points will be indicated on a map. An alternative view showing the odometer measurements more prominently is available by touching the "Mode" button in the upper menu bar. You may subtract distance when you travel off course. A toggle button switches between on course (blue line) and off course (red line) travel. Distance measurement can be set to miles or kilometers and time measurement can be set to minutes and seconds or decimal minutes. The distance may be displayed with either 2 or 3 digit precision. Make your selections by touching the Settings with a "sprocket" button beside the "About" button. The app is designed to adjust the GPS coordinates of a moving vehicle owing to the time between reception of new GPS signals and to the time lag between the time the signal was generated from satellites and the time when processing actually occurs in the app. Also, you may adjust the location coordinate by the distance between the GPS receiver in the car (either the iPhone or iPad or some third-party GPS receiver) and the position on the car where a rally may measure time or location at timed controls (sometimes this is the front of the car or the center of the front wheels). These three potential errors in coordinate measurement are discussed at length in a 6-part thread in the Facebook "Road Rally Tech Talk" forum. To fine-tune the app's distance between GPS receiver and front wheels (if necessary) and clock time figures to the rally's official measures with the options in the Adjustments popup. Unlock to make adjustments and lock to save the changes you make and to prevent inadvertent changes. You may pause or gain time on a particular stage by adding or subtracting time on a stage. Also, you might wish to "bump" the recorded GPS distance +/- to align with official rally distances. Touch the button in the lower right-hand corner to access the "bump" function. A log view shows additional information at each stage including the latitude, longitude, and the current speed at the time the New Stage button was touched. Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.

Screenshots

GPS Rally Odometer4 screens

Verdict

The call

The clearest difference is price: GPS Rally Odometer at $15.99 against ChronoMaster's $64.99. GPS Rally Odometer also leads on update cadence (every 3 weeks vs every 9 months) and device support (3 vs 1). ChronoMaster's advantage is iOS requirement (9 vs 13.6). On review sentiment, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

ChronoMaster costs $64.99 and GPS Rally Odometer $15.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ChronoMaster ships an update every 9 months, GPS Rally Odometer every 3 weeks. The most recent releases landed on June 5, 2026 and September 9, 2026 respectively.

Scorecard4 real differences · 4 level
ChronoMaster versus GPS Rally Odometer: the parameters behind the verdict, then further details
ParameterChronoMasterGPS Rally Odometer
Price$64.99$15.99 — better
Positive reviews0.0% of reviews0.0% of reviews
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS9 — better13.6
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperBrandsOnSpeed GmbHMSYapps

Customer experience

ChronoMaster

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

GPS Rally Odometer

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

ChronoMaster

No in-app purchases

None

GPS Rally Odometer

No in-app purchases

Questions

Is ChronoMaster free?
ChronoMaster costs $64.99, with no in-app purchases.
Is GPS Rally Odometer free?
GPS Rally Odometer costs $15.99, with no in-app purchases.
Do ChronoMaster or GPS Rally Odometer have ads?
Neither ChronoMaster nor GPS Rally Odometer shows ads.
Which is updated more often, ChronoMaster or GPS Rally Odometer?
ChronoMaster ships an update every 9 months, and GPS Rally Odometer every 3 weeks. Most recently, ChronoMaster was updated on June 5, 2026 and GPS Rally Odometer on September 9, 2026.

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