# StroopEffect2 vs Viva La Lingo

The clearest difference is price: Viva La Lingo at Free against StroopEffect2's $2.99. Viva La Lingo also leads on update cadence (every 2 days vs every 14 months). StroopEffect2's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Viva La Lingo is free to download; StroopEffect2 costs $2.99 up front. Viva La Lingo sells 3 in-app purchases, starting at $1.99 per month. StroopEffect2 asks for nothing beyond the download.

StroopEffect2 ships an update every 14 months, Viva La Lingo every 2 days. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | StroopEffect2 | Viva La Lingo |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 2 MB | 82 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Leonard Friedrich Marx](https://appshunter.io/developer/1779273892) |

## 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


### Viva La Lingo

[App page](https://appshunter.io/ios/app/viva-la-lingo-learn-languages/id6738089310)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Annual | $8.99 | per year |
| Premium Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is StroopEffect2 free?

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

### Is Viva La Lingo free?

Viva La Lingo is free to download, with in-app purchases available.

### Do StroopEffect2 or Viva La Lingo have ads?

Viva La Lingo shows ads; StroopEffect2 does not.

### Which is updated more often, StroopEffect2 or Viva La Lingo?

StroopEffect2 ships an update every 14 months, and Viva La Lingo every 2 days. Most recently, StroopEffect2 was updated on October 3, 2026 and Viva La Lingo on September 30, 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.*