Comparison

Rotax Global vs Fox + Son Jetmax

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

Head to head
About

Rotax Global

This app offers comprehensive information for the Rotax Max Challenge Grand Finals. Users can access live timing, race updates, driver notifications, and track details. It also provides essential event information like schedules, regulations, and local amenities.

Highlights
  • Live Timing and Results
  • Live Streaming
  • Race Updates
  • Driver Notifications
  • Track Information
  • Event Schedule
  • Regulations and Info
Features
Read full description

Welcome to Rotax App. This application provides information about Rotax Max Challenge Grand Finals. The user will be able to access several features like: - Live Timing and results - Live streaming - Time schedule - Race updates - Driver notifications - Weather forecast - Track info - Entrylist - Regulations - General info - Paddock plan - Drivers info - Hotel, restaurants, emergency info - Rent-a-car link - NOTICE BOARD, virtual notices and public announcements - BRIEFING, virtual drivers meeting and behaviour instructions

About

Fox + Son Jetmax

This application simplifies jetting calculations for Rotax engines, factoring in weather and altitude. It provides racers with precise tuning recommendations, including relative horsepower and an interactive gear chart, to optimize performance on race day.

Highlights
  • Rotax engine jetting calculator
  • Weather and altitude adjustments
  • Relative horsepower calculation
  • Interactive gear chart
  • Rotax tuning tips
Features
Read full description

Precision jetting made easy — This app helps you calculate jetting for Rotax engines based on weather and altitude. Now every Rotax racer has access to the same jetting Fox + Son has used to power our engines to countless Rotax National wins and Grand Finals tickets. After many months of development and testing, we have successfully brought the same jetting algorithms we use on our dyno to a quick, easy-to-use app. We have also included all of our popular Rotax tuning tips that are found on our website, along with a handy interactive gear chart for your convenience. As we do with our website, we will continually update the app as we discover new tuning information. Anytime a new cylinder or part is introduced, all of the testing we do at the shop will flow directly to Jetmax. Jetmax will also calculate the relative horsepower for that atmospheric condition. The relative horsepower percentage is helpful information to have when selecting your gear ratio. In certain situations you can benefit from increasing your gear ratio when HP is low & decreasing your gear ratio when HP is high. Whether you're competing at the track or fine-tuning your kart for practice, Jetmax gives you accurate, reliable recommendations so you can focus on performance. Features: - Jetting calculator for Rotax engines - Calculates relative horsepower - Includes an interactive gearing chart Engineered by racers, for racers — Fox + Son Jetmax App delivers the tools you need to stay competitive on race day. *You must have a valid subscription in order to use this app.

Screenshots

Rotax Global4 screens
Fox + Son Jetmax2 screens

Verdict

The call

The clearest difference is review sentiment: Fox + Son Jetmax at 100% against Rotax Global's 0%. Fox + Son Jetmax also leads on rating (5.0 vs 2.0). Rotax Global's advantage is in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 3 months). On price, ratings volume, ads and device support 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

Both are free to download. Fox + Son Jetmax sells 1 in-app purchase, starting at $7.99 per year. Rotax Global asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fox + Son Jetmax holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 0% of Rotax Global's written reviews are positive against 100% of Fox + Son Jetmax's.

UpkeepUpdate frequency

Rotax Global ships an update every 5 weeks, Fox + Son Jetmax every 3 months. The most recent releases landed on October 24, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
Rotax Global versus Fox + Son Jetmax: the parameters behind the verdict, then further details
ParameterRotax GlobalFox + Son Jetmax
PriceFreeFree
Rating2.0 (4 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings4 — better2
Update frequencyEvery 5 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size16 MB16 MB
Age rating17+4+
DeveloperBRP-Rotax GmbH & Co KGTrophy Inc.

Customer experience

Rotax Global

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Fox + Son Jetmax

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Rotax Global

No in-app purchases

1 purchases

Fox + Son Jetmax

Subscriptions1
  • Premium Yearly7 Days trial$7.991 Year

Questions

Is Rotax Global free?
Rotax Global is free to download, with no in-app purchases.
Is Fox + Son Jetmax free?
Fox + Son Jetmax is free to download, with in-app purchases available.
Which has better reviews, Rotax Global or Fox + Son Jetmax?
Fox + Son Jetmax is rated higher. Rotax Global averages 2.0 out of 5 from 4 ratings, while Fox + Son Jetmax averages 5.0 from 2 ratings.
Do Rotax Global or Fox + Son Jetmax have ads?
Neither Rotax Global nor Fox + Son Jetmax shows ads.
Which is updated more often, Rotax Global or Fox + Son Jetmax?
Rotax Global ships an update every 5 weeks, and Fox + Son Jetmax every 3 months. Most recently, Rotax Global was updated on October 24, 2026 and Fox + Son Jetmax on September 23, 2026.

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