# Het Marnix vs SwimGym

The clearest difference is update cadence: SwimGym at every 3 months against Het Marnix's every 7 months. Het Marnix's advantage is iOS requirement (12.2 vs 15.0). 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.

Het Marnix ships an update every 7 months, SwimGym every 3 months. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Het Marnix | SwimGym |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (12 ratings)](https://appshunter.io/ios/app/swimgym/id1206802430/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 350 MB | 213 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Stichting Sportbedrijf Amsterdam Centrum SpACe](https://appshunter.io/developer/1457169196) | [SwimGym B.V.](https://appshunter.io/developer/1450272552) |

## What reviewers say

### Het Marnix

[App page](https://appshunter.io/ios/app/het-marnix/id972592701)

**Features:** macOS Compatibility

**In-app purchases:** none


### SwimGym

[App page](https://appshunter.io/ios/app/swimgym/id1206802430)

This app provides a comprehensive training platform for swimmers and triathletes. Access weekly programs, instructional videos, and coach tips. Book sessions, track fitness, and monitor nutrition to enhance your performance.

**Highlights:** Weekly swimming programs, Instructional videos, Coach tips, Daily schedule, Book swim training, Fitness exercises, Nutrition tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Het Marnix free?

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

### Is SwimGym free?

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

### Do Het Marnix or SwimGym have ads?

Neither Het Marnix nor SwimGym shows ads.

### Which is updated more often, Het Marnix or SwimGym?

Het Marnix ships an update every 7 months, and SwimGym every 3 months. Most recently, Het Marnix was updated on September 9, 2026 and SwimGym on September 20, 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.*