Comparison

Fox + Son Jetmax vs LapLift Sync

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

Head to head
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
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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.

About

LapLift Sync

Seamlessly transfer your track data from an AiM logger to your LapLift account wirelessly. Avoid laptops and cables, and get your performance insights instantly after each session.

Highlights
  • Wireless Wi-Fi connection to AiM logger
  • Select and transfer specific sessions
  • Automatic resume on connection loss
  • Real-time transfer completion notifications
  • Automatic session pulling in Track Mode
Features
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LapLift Sync moves your track data from your AiM logger to LapLift, without a laptop. Connect over Wi-Fi in the paddock, pick the sessions you want, and they upload straight to your LapLift account. No card readers, no cables, no waiting until you get home to find out whether the lap you thought was quick actually was. WHAT IT DOES • Connects to your AiM logger over its own Wi-Fi or a shared network • Lists what's on the device, and tells you which sessions are already in LapLift so you never transfer the same file twice • Resumes on its own: if the signal drops, sessions stay queued on the phone and upload when you have a connection again • Tells you the moment a transfer finishes, so you know your data is safely up before you pack the car TRACK MODE Arm Track Mode between sessions and leave the app open — it watches your logger and pulls in each new session as it is recorded, so your data is in LapLift by lunch instead of at midnight. WHAT YOU NEED • A LapLift account (free — sign up in the app or at laplift.app) • A Wi-Fi-equipped AiM data logger. Tested with the Solo 2 and MXG; other AiM devices using the same Wi-Fi connection may work. This app is a companion to LapLift, where the actual analysis happens: lap comparison, track maps, corner-by-corner segment times, video overlays, and comparison against other drivers at the same circuit. Not affiliated with or endorsed by AiM Tech.

Screenshots

Fox + Son Jetmax2 screens
LapLift Sync3 screens

Verdict

The call

The clearest difference is in-app purchases: LapLift Sync at none against Fox + Son Jetmax's 1. LapLift Sync also leads on update cadence (weekly vs every 3 months). On price, rating, ratings volume and ads 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. LapLift Sync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Fox + Son Jetmax against 5.0 for LapLift Sync. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Fox + Son Jetmax ships an update every 3 months, LapLift Sync weekly. The most recent releases landed on September 23, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Fox + Son Jetmax versus LapLift Sync: the parameters behind the verdict, then further details
ParameterFox + Son JetmaxLapLift Sync
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size16 MB29 MB
Age rating4+4+
DeveloperTrophy Inc.Alexander Krochik

In-app purchases

1 purchases

Fox + Son Jetmax

Subscriptions1
  • Premium Yearly7 Days trial$7.991 Year
None

LapLift Sync

No in-app purchases

Questions

Is Fox + Son Jetmax free?
Fox + Son Jetmax is free to download, with in-app purchases available.
Is LapLift Sync free?
LapLift Sync is free to download, with no in-app purchases.
Which has better reviews, Fox + Son Jetmax or LapLift Sync?
Fox + Son Jetmax and LapLift Sync are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Fox + Son Jetmax or LapLift Sync have ads?
Neither Fox + Son Jetmax nor LapLift Sync shows ads.
Which is updated more often, Fox + Son Jetmax or LapLift Sync?
Fox + Son Jetmax ships an update every 3 months, and LapLift Sync weekly. Most recently, Fox + Son Jetmax was updated on September 23, 2026 and LapLift Sync on October 25, 2026.

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