# The mark experiment vs StudiTrainer

The clearest difference is update cadence: StudiTrainer at every 9 months against The mark experiment's every 31 months. The mark experiment's advantage is iOS requirement (9.2 vs 13.0). 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.

The mark experiment ships an update every 31 months, StudiTrainer every 9 months. The most recent releases landed on September 8, 2026 and December 17, 2025 respectively.

## The numbers

| Metric | The mark experiment | StudiTrainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 9 months** |
| Size | 14 MB | 42 MB |
| Requires iOS | **9.2** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jonas Kellert](https://appshunter.io/developer/1187446918) | [FH Muenster](https://appshunter.io/developer/371645686) |

## What reviewers say

### The mark experiment

[App page](https://appshunter.io/ios/app/the-mark-experiment/id1187446919)

**Features:** macOS Compatibility

**In-app purchases:** none


### StudiTrainer

[App page](https://appshunter.io/ios/app/studitrainer/id1628781646)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The mark experiment free?

The mark experiment is free to download, with no in-app purchases.

### Is StudiTrainer free?

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

### Do The mark experiment or StudiTrainer have ads?

Neither The mark experiment nor StudiTrainer shows ads.

### Which is updated more often, The mark experiment or StudiTrainer?

The mark experiment ships an update every 31 months, and StudiTrainer every 9 months. Most recently, The mark experiment was updated on September 8, 2026 and StudiTrainer on December 17, 2025.

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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.*