# Leiden Marathon vs D100

The clearest difference is update cadence: Leiden Marathon at every 6 months against D100's every 16 months. D100's advantage is iOS requirement (15.1 vs 17.0). 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.

Leiden Marathon ships an update every 6 months, D100 every 16 months. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Leiden Marathon | D100 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 16 months |
| Size | 76 MB | 30 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stichting Marathon Leiden](https://appshunter.io/developer/1578470191) | [Medisport Bremmers BV](https://appshunter.io/developer/1785684175) |

## What reviewers say

### Leiden Marathon

[App page](https://appshunter.io/ios/app/leiden-marathon/id1578470189)

**In-app purchases:** none


### D100

[App page](https://appshunter.io/ios/app/d100/id6739502993)

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

**In-app purchases:** none


## Frequently asked questions

### Is Leiden Marathon free?

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

### Is D100 free?

D100 is free to download, with no in-app purchases.

### Do Leiden Marathon or D100 have ads?

Neither Leiden Marathon nor D100 shows ads.

### Which is updated more often, Leiden Marathon or D100?

Leiden Marathon ships an update every 6 months, and D100 every 16 months. Most recently, Leiden Marathon was updated on October 20, 2026 and D100 on October 28, 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.*