# Size test vs C2 Stroop Task

The clearest difference is price: Size test at $0.99 against C2 Stroop Task's $3.99. C2 Stroop Task's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Size test costs $0.99 and C2 Stroop Task $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on May 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Size test | C2 Stroop Task |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | Every 10 months |
| Size | 1 MB | 1 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Viacheslav Romanenko](https://appshunter.io/developer/1046372418) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Size test

[App page](https://appshunter.io/ios/app/size-test/id1059703529)

**In-app purchases:** none


### C2 Stroop Task

[App page](https://appshunter.io/ios/app/c2-stroop-task/id1638265933)

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

**In-app purchases:** none


## Frequently asked questions

### Is Size test free?

Size test costs $0.99, with no in-app purchases.

### Is C2 Stroop Task free?

C2 Stroop Task costs $3.99, with no in-app purchases.

### Do Size test or C2 Stroop Task have ads?

Neither Size test nor C2 Stroop Task shows ads.

### Which is updated more often, Size test or C2 Stroop Task?

Size test ships an update every 10 months, and C2 Stroop Task every 10 months. Most recently, Size test was updated on May 19, 2026 and C2 Stroop Task on September 24, 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.*