# Rotax MAX Jetting vs Kartnote

The clearest difference is update cadence: Kartnote at weekly against Rotax MAX Jetting's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rotax MAX Jetting ships an update every 3 months, Kartnote weekly. The most recent releases landed on August 31, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Rotax MAX Jetting | Kartnote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.9 (8 ratings)](https://appshunter.io/ios/app/rotax-max-jetting/id1152315347/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 13 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BRP-Rotax GmbH & Co KG](https://appshunter.io/developer/1152315346) | [Nordlate Oy](https://appshunter.io/developer/1878781026) |

## 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


### Kartnote

[App page](https://appshunter.io/ios/app/kartnote-karting-analytics/id6496852071)

**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 Kartnote free?

Kartnote is free to download, with no in-app purchases.

### Do Rotax MAX Jetting or Kartnote have ads?

Neither Rotax MAX Jetting nor Kartnote shows ads.

### Which is updated more often, Rotax MAX Jetting or Kartnote?

Rotax MAX Jetting ships an update every 3 months, and Kartnote weekly. Most recently, Rotax MAX Jetting was updated on August 31, 2026 and Kartnote on September 17, 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.*