# Fox + Son Jetmax vs SetupKart Pro

The clearest difference is update cadence: SetupKart Pro at weekly against Fox + Son Jetmax's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Fox + Son Jetmax sells 1 in-app purchase, starting at $7.99 per year and SetupKart Pro sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Fox + Son Jetmax ships an update every 3 months, SetupKart Pro weekly. The most recent releases landed on September 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Fox + Son Jetmax | SetupKart Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fox-plus-son-jetmax/id6748326003/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Subscription | — |
| Size | 16 MB | 49 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trophy Inc.](https://appshunter.io/developer/1752591571) | [Hermann Kopp](https://appshunter.io/developer/1887657455) |

## What reviewers say

### Fox + Son Jetmax

[App page](https://appshunter.io/ios/app/fox-plus-son-jetmax/id6748326003)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Yearly | $7.99 | per year |


### SetupKart Pro

[App page](https://appshunter.io/ios/app/setupkart-pro/id6761076873)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SetupKart Pro Monatsabo | $5.99 | per month |
| Jahresabo | $29.99 | per year |


## Frequently asked questions

### Is Fox + Son Jetmax free?

Fox + Son Jetmax is free to download, with in-app purchases available.

### Is SetupKart Pro free?

SetupKart Pro is free to download, with in-app purchases available.

### Do Fox + Son Jetmax or SetupKart Pro have ads?

Neither Fox + Son Jetmax nor SetupKart Pro shows ads.

### Which is updated more often, Fox + Son Jetmax or SetupKart Pro?

Fox + Son Jetmax ships an update every 3 months, and SetupKart Pro weekly. Most recently, Fox + Son Jetmax was updated on September 23, 2026 and SetupKart Pro on October 6, 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.*