Fox + Son Jetmax vs KartCoach

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.

You know that a tenth of a second isn't just a number — it's the difference between the top step and the middle of the pack. Whether you're chasing a club championship or shaving seconds off your personal best, the feel of the kart only takes you so far. KartCoach turns your raw telemetry into a definitive roadmap for speed. CONNECT DIRECTLY TO YOUR AIM MYCHRON or ALFANO CSV UPLOAD. KartCoach connects to your AiM MyChron 5 or MyChron 5S over WiFi and downloads your session data in seconds. No cables. No computer. No manual exports. CORNER-BY-CORNER ANALYSIS Select any two laps to compare and KartCoach shows you exactly what happened at every reference point — apex speed, brake point, acceleration point, and racing line deviation against your reference lap. Every number is calculated directly from your telemetry. No guesswork. YOUR RACE ENGINEER IN YOUR POCKET After every session, KartCoach generates an Engineer's Report — a concise debrief that tells you where your time is going, what to focus on next session, and what you are already doing well. Sector timing shows whether your gap is in S1, S2, or S3 so you always know exactly where to look. RACING LINE COMPARISON Overlay your GPS racing line against any reference lap on a live satellite map of the track. See where your line diverges, where you are wide, and where your braking and acceleration points compare to the reference. LAP PLAYBACK Watch your lap play back in real time with a live time gap showing exactly where you are gaining and losing against your reference lap. Scrub through any moment to see your exact track position. FIND A COACH Browse professional karting coaches, view their availability, and book a session directly through the app. Payments are handled securely — your card is authorized at booking and only charged when the coach confirms. FOR COACHES List your availability, manage your student bookings, and get paid directly through the app. Set your own rate, accept or decline requests, and track your earnings — all in one place. WORKS WITH AiM MyChron 5 and 6data loggers recording XRK format sessions. Subscription required for driver telemetry analysis features. 7-day free trial available. Coaching marketplace is free to browse. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/