# Rally Timer Pro vs Jetting Rotax Max Kart

The clearest difference is update cadence: Jetting Rotax Max Kart at monthly against Rally Timer Pro's every 14 months. Jetting Rotax Max Kart also leads on price ($7.99 vs $9.99) and iOS requirement (9.0 vs 12.0). On ads, in-app purchases and device support there is nothing between them.

Rally Timer Pro costs $9.99 and Jetting Rotax Max Kart $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rally Timer Pro ships an update every 14 months, Jetting Rotax Max Kart monthly. Both last shipped on October 29, 2026.

## The numbers

| Metric | Rally Timer Pro | Jetting Rotax Max Kart |
| --- | --- | --- |
| Price | $9.99 | **$7.99** |
| Rating | — | **[4.9 (9 ratings)](https://appshunter.io/ios/app/jetting-rotax-max-kart/id1453317954/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Monthly** |
| Monetization | — | Paid |
| Size | 7 MB | 40 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dream-Up](https://appshunter.io/developer/445196122) | [Ballistic Solutions LLC](https://appshunter.io/developer/1611909747) |

## What reviewers say

### Rally Timer Pro

[App page](https://appshunter.io/ios/app/rally-timer-pro/id1078491284)

**Features:** macOS Compatibility

**In-app purchases:** none


### Jetting Rotax Max Kart

[App page](https://appshunter.io/ios/app/jetting-rotax-max-kart/id1453317954)

This app provides jetting recommendations for Rotax 125 Max non-EVO kart engines using environmental data and engine configuration. It offers two tuning modes and detailed insights into fuel mix quality and carburetor performance.

**Highlights:** Jetting recommendations for Rotax 125 Max engines, Automatic weather data acquisition, Two tuning modes: 'By regulations' and 'Freestyle', Detailed tuning parameters, History of jetting setups, Graphic display of fuel mix quality, Adjustable fuel/oil ratio

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

**In-app purchases:** none


## Frequently asked questions

### Is Rally Timer Pro free?

Rally Timer Pro costs $9.99, with no in-app purchases.

### Is Jetting Rotax Max Kart free?

Jetting Rotax Max Kart costs $7.99, with no in-app purchases.

### Do Rally Timer Pro or Jetting Rotax Max Kart have ads?

Neither Rally Timer Pro nor Jetting Rotax Max Kart shows ads.

### Which is updated more often, Rally Timer Pro or Jetting Rotax Max Kart?

Rally Timer Pro ships an update every 14 months, and Jetting Rotax Max Kart monthly. Most recently, Rally Timer Pro was updated on October 29, 2026 and Jetting Rotax Max Kart on October 29, 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.*