# StroopEffect2 vs Math Ninjas FULL

The clearest difference is price: StroopEffect2 at $2.99 against Math Ninjas FULL's $3.99. Math Ninjas FULL's advantage is iOS requirement (13.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

StroopEffect2 costs $2.99 and Math Ninjas FULL $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

StroopEffect2 ships an update every 14 months, Math Ninjas FULL every 12 months. The most recent releases landed on September 18, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | StroopEffect2 | Math Ninjas FULL |
| --- | --- | --- |
| Price | **$2.99** | $3.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 12 months** |
| Monetization | Paid | — |
| Size | 2 MB | 198 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [HARASHOW Interactive](https://appshunter.io/developer/356148278) |

## What reviewers say

### StroopEffect2

[App page](https://appshunter.io/ios/app/stroopeffect2/id1050388935)

This app demonstrates the psychological phenomenon known as the Stroop effect. It presents a time-trial game where users must identify the color of words, even when the word itself names a different color. It's a fun way to explore cognitive processing and reaction times.

**Highlights:** Stroop effect demonstration, Time trial game mode, Cognitive processing experiment, Reaction time measurement, Educational psychology tool

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

**In-app purchases:** none


### Math Ninjas FULL

[App page](https://appshunter.io/ios/app/math-ninjas-full/id1534842186)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is StroopEffect2 free?

StroopEffect2 costs $2.99, with no in-app purchases.

### Is Math Ninjas FULL free?

Math Ninjas FULL costs $3.99, with no in-app purchases.

### Do StroopEffect2 or Math Ninjas FULL have ads?

Neither StroopEffect2 nor Math Ninjas FULL shows ads.

### Which is updated more often, StroopEffect2 or Math Ninjas FULL?

StroopEffect2 ships an update every 14 months, and Math Ninjas FULL every 12 months. Most recently, StroopEffect2 was updated on September 18, 2026 and Math Ninjas FULL on September 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.*