# Cortex: N-Back Brain Training — Stroop, Schulte, Reaction Test

> Stroop, Schulte, Reaction Test (iPhone/iPad app by Stephane de Barbanson.)

- Source: https://appshunter.io/ios/app/cortex-n-back-brain-training/id6775019270 (this page in markdown: same URL + `.md`)
- Developer: [Stephane de Barbanson](https://appshunter.io/developer/1876500326)
- Category: Education, Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 46 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Norwegian Bokmål, European Portuguese, European Spanish, Swedish
- Released: 2026-06-04
- Data updated: 2026-10-05
- User reviews in markdown: https://appshunter.io/ios/app/cortex-n-back-brain-training/id6775019270/reviews.md

## What is Cortex?

Cortex is an offline brain-training app: dual N-Back, a Stroop test, Schulte tables, a reaction time test and an RSVP speed reader, plus Sudoku, Nonogram and Word Search puzzles. No account, no internet, no tracking: nothing leaves your phone.
Also known as: n-back memory test, Stroop effect test, Schulte grid, reflex test, speed reading trainer.

Seventeen focused brain games and classic puzzles, plus Peak Hours: a personal cognitive instrument you won't find in other brain trainers. Try everything free for 3 days, then unlock it all with a single purchase. No subscription, no ads, no accounts, and nothing leaves your device.

PEAK HOURS
A quick reaction check you can take any time of day. Over time it charts when your mind is sharpest and reveals whether you're a morning lark, a night owl, or steady all day. Fully private, stored only on your phone.

THE GAMES
Memory, focus, reading, timing and spatial skills, each built around a real task:
- N-Back, Sequence Memory and Remember-To for memory
- Stroop, Track and Peripheral Vision for attention
- Schulte Table and Speed Reader for visual scanning and reading
- Mental Rotation for spatial reasoning
- Inner Clock for your sense of time
- Number Sequences for pattern reasoning

SKILL DRILLS
- Mental Math: learn a real trick, then drill it
- Speed Math and Estimation for arithmetic fluency and number sense

CLASSIC PUZZLES
- Nonogram: solve the number clues to reveal a hidden picture
- Sudoku and Word Search, as pure puzzles

3-DAY FREE TRIAL, THEN PAY ONCE
Every game is unlocked free for 3 days. Keep them all forever with a single one-time purchase. No weekly trials, no renewing subscription, no surprise charges.

PRIVATE BY DESIGN
No accounts, no analytics, no advertising, no third-party trackers. The app works fully offline and your stats stay on your phone. Privacy here isn't a setting you switch on; it's how the app is built.

BUILT FOR FOCUS
A precision design made for concentration, not a candy-coloured slot machine. Make it yours with multiple themes, light or dark, and a custom accent colour. Track your personal bests at your own pace.

Now fully available in nine languages.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all games | $3.99 | one-time |



## Version history (last 5 releases)

### 2.0.7 — 2026-10-03

The App Store now shows every language Cortex speaks: English, Dutch, German, French, Spanish, Italian, Portuguese, Swedish and Norwegian. Plus small fixes and polish.

### 2.0.6 — 2026-09-26

New in Settings: discover more apps from Studio Barbanson, and rate Cortex in one tap. Small fixes and polish.

### 2.0.5 — 2026-09-24

Fixes the Speed Reader quiz sometimes marking a correct answer as wrong. Small text fixes and polish.

### 2.0.4 — 2026-09-23

Fixes a bug where the Start button could sit below the screen edge on smaller phones or with larger text sizes. Every game screen now scrolls when needed, so all games are playable at any text size. The text size setting has been removed: text now always shows at a size where every screen stays clean and readable. Resetting your progress now also clears it from iCloud.

### 2.0.3 — 2026-09-09

Fixes and polish, including a cleaner language picker in Settings.

## Apps similar to Cortex

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cognilo: Brain Training Games](https://appshunter.io/ios/app/cognilo-brain-training-games/id6808798253) | — | Free | Education |
| [MemoryLoop](https://appshunter.io/ios/app/memoryloop/id6757319403) | — | Free | Education |
| [Caja de herramientas de TCC](https://appshunter.io/ios/app/caja-de-herramientas-de-tcc/id6746455803) | — | $0.99 | Education |
| [N-Back — Dual N-Back Training](https://appshunter.io/ios/app/n-back-dual-n-back-training/id6792875395) | — | Free | Education |
| [Cubilo: Spatial Thinking](https://appshunter.io/ios/app/cubilo-spatial-thinking/id6792619988) | — | Free | Education |
| [NeuroSpace: Brain Training](https://appshunter.io/ios/app/neurospace-brain-training/id6797205292) | — | Free | Education |

## More apps by Stephane de Barbanson

- [Calmly Student](https://appshunter.io/ios/app/calmly-student/id6759039617)
- [Plump Card Game](https://appshunter.io/ios/app/plump-card-game/id6759072535)
- [BI Data Hero](https://appshunter.io/ios/app/bi-data-hero/id6762004619)
- [Daypages - Calm Calendar](https://appshunter.io/ios/app/daypages-calm-calendar/id6775595996)
- [My Football Story](https://appshunter.io/ios/app/my-football-story/id6777795399)

All apps by Stephane de Barbanson: https://appshunter.io/developer/1876500326

## Related topics

[cortex iq](https://appshunter.io/ios/topics/cortex-iq)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-05.*