# Rotax MAX Jetting vs Kart Chassis Setup PRO

The clearest difference is review sentiment: Kart Chassis Setup PRO at 88% against Rotax MAX Jetting's 0%. Kart Chassis Setup PRO also leads on rating (4.3 vs 1.9) and update cadence (every 6 weeks vs every 3 months). Rotax MAX Jetting's advantage is price (Free vs $7.99). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Rotax MAX Jetting is free to download; Kart Chassis Setup PRO costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kart Chassis Setup PRO holds the better App Store score, 4.3 against 1.9. Both are backed by a comparable volume of ratings — 8 and 6 respectively. Written reviews point the same way: 0% of Rotax MAX Jetting's written reviews are positive against 88% of Kart Chassis Setup PRO's.

Rotax MAX Jetting ships an update every 3 months, Kart Chassis Setup PRO every 6 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Rotax MAX Jetting | Kart Chassis Setup PRO |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | [1.9 (8 ratings)](https://appshunter.io/ios/app/rotax-max-jetting/id1152315347/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/kart-chassis-setup-pro/id1479976538/reviews)** |
| Number of ratings | **8** | 6 |
| Positive reviews | 0.0% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | **Free** | Paid |
| Size | 13 MB | 49 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BRP-Rotax GmbH & Co KG](https://appshunter.io/developer/1152315346) | [Ballistic Solutions LLC](https://appshunter.io/developer/1611909747) |

## What reviewers say

### Rotax MAX Jetting

[App page](https://appshunter.io/ios/app/rotax-max-jetting/id1152315347)

This app helps users find the ideal carburetor main jet size for Rotax kart engines. It calculates settings based on ambient conditions like temperature, altitude, and air pressure, either automatically via GPS or manually. Supports various Rotax MAX engine types.

**Highlights:** Optimal main jet calculation, Supports multiple Rotax MAX engines, Automatic GPS weather data, Manual ambient parameter entry, Celsius/Fahrenheit toggle, Meters/Feet toggle

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Kart Chassis Setup PRO

[App page](https://appshunter.io/ios/app/kart-chassis-setup-pro/id1479976538)

This app provides data-driven recommendations for adjusting go-kart chassis setups. It analyzes current configurations, tire pressures, temperatures, cornering behavior, and track conditions to help resolve setup issues with detailed explanations and visual aids.

**Highlights:** Chassis data input, Tire pressure and temperature analysis, Cornering behavior analysis, Weather and track condition integration, Setup history tracking, Visual explanations for adjustments

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rotax MAX Jetting free?

Rotax MAX Jetting is free to download, with no in-app purchases.

### Is Kart Chassis Setup PRO free?

Kart Chassis Setup PRO costs $7.99, with no in-app purchases.

### Which has better reviews, Rotax MAX Jetting or Kart Chassis Setup PRO?

Kart Chassis Setup PRO is rated higher. Rotax MAX Jetting averages 1.9 out of 5 from 8 ratings, while Kart Chassis Setup PRO averages 4.3 from 6 ratings.

### Do Rotax MAX Jetting or Kart Chassis Setup PRO have ads?

Neither Rotax MAX Jetting nor Kart Chassis Setup PRO shows ads.

### Which is updated more often, Rotax MAX Jetting or Kart Chassis Setup PRO?

Rotax MAX Jetting ships an update every 3 months, and Kart Chassis Setup PRO every 6 weeks. Most recently, Rotax MAX Jetting was updated on November 2, 2026 and Kart Chassis Setup PRO on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*