# Dual N-Back: Brain Trainer — Working Memory & Focus IQ Game

> Cognitive training app for working memory and focus based on the n-back task. (iPhone/iPad app by Ahmed Sayed Mokhtar Mohamed.)

- Source: https://appshunter.io/ios/app/dual-n-back-brain-trainer/id6783484280 (this page in markdown: same URL + `.md`)
- Developer: [Ahmed Sayed Mokhtar Mohamed](https://appshunter.io/developer/1470826267)
- Category: Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.0 · 26 MB
- Languages: American English
- Released: 2026-06-24
- Data updated: 2026-08-13
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/dual-n-back-brain-trainer/id6783484280/reviews.md

## What is Dual N?

Train your working memory with Dual N-Back, the bold, no-nonsense brain training game built on the classic n-back task.

Spot when the current stimulus matches the one N steps back. Sounds simple. It isn't. That's the point.

Dual N-Back puts three independent streams in front of you:
• Position — a square lights up somewhere in a 3x3 grid
• Audio — a spoken consonant
• Color — the square changes color

Toggle the streams on or off to play Single, Dual, or Triple N-back. Match one stream, two, or all three at once and feel your focus and concentration stretch.

ADAPTIVE DIFFICULTY THAT KEEPS PACE
Following the Jaeggi protocol, the level adapts to you. Hit 80% accuracy and N steps up automatically. Slip below 50% and it eases back down, so you are always working right at the edge of your ability. Prefer to set your own pace? Manual mode locks N exactly where you want it, anywhere from 1 to 9.

SEE YOURSELF IMPROVE
• Daily streak to keep the habit going
• Best N, total sessions, and average accuracy at a glance
• Charts for level over time, accuracy per stream, and sessions this week
• Per-session results with a balanced-accuracy ring and a full breakdown of hits, misses, and false alarms for every stream

MAKE IT YOURS
• Set trials per block from 10 to 40
• Adjust speed from 1.5 to 4.0 seconds per stimulus
• Toggle haptic feedback
• Dark, light, or system theme
• Optional on-screen captions for the spoken letters

PRIVATE, OFFLINE, FREE
• Completely free with no ads
• No account, no sign-up, nothing to subscribe to
• Works fully offline
• All your progress stays on your device

THE SCIENCE
The n-back task is one of the most studied tools in cognitive psychology. This app is modeled on the dual n-back working memory training used in research by Jaeggi and colleagues, where participants practiced matching two simultaneous streams over repeated sessions. We have kept the protocol faithful, from the adaptive level adjustment to the dual-stream design, so your practice mirrors the method behind the studies.

A FOCUSED TRAINING SESSION, NOT A TIME SINK
No streaks of pop-ups. No energy meters. No nagging. Just a clean, high-contrast training ground for your mind. Open the app, run a block, and get back to your day.

Whether you are a student, a lifelong learner, someone exploring focus and attention exercises, or simply curious how far your working memory can go, Dual N-Back gives you a serious tool with zero clutter.

Tap to start your first block and find your N.

## Key features

- Dual N-back task training
- Adaptive difficulty based on performance
- Manual difficulty setting (N=1-9)
- Multiple stimulus streams (position, audio, color)
- Progress tracking and statistics
- Customizable session settings
- Offline functionality


## Frequently asked questions about Dual N

### What is the Dual N-Back training method?

Dual N-Back trains your working memory by requiring you to identify when a current stimulus matches one that appeared N steps back. This app implements the Jaeggi protocol, using position, audio, and color streams for a comprehensive cognitive workout.

### How does the adaptive difficulty in Dual N-Back work?

The app automatically adjusts the difficulty level (N steps) based on your accuracy. If you achieve 80% accuracy, N increases; if you fall below 50%, N decreases, keeping you at the edge of your cognitive capacity.

### Can I customize the training sessions in Dual N-Back?

Yes, you can customize various aspects of your training sessions. This includes setting trials per block (10-40), adjusting stimulus speed (1.5-4.0 seconds), toggling haptic feedback, and choosing between dark, light, or system themes.

### Is Dual N-Back available offline?

Yes, Dual N-Back works fully offline. All your progress is saved locally on your device, and no account or sign-up is required, ensuring complete privacy and accessibility.

### What kind of progress tracking does Dual N-Back offer?

The app provides detailed progress tracking, including your daily streak, best N achieved, total sessions, and average accuracy. You can also view charts for level progression, accuracy per stream, and weekly sessions.

### Does Dual N-Back have ads?

No, Dual N-Back is completely free with no advertisements. The app is designed to provide a focused training experience without any interruptions from ads.

### What is the age rating for Dual N-Back?

Dual N-Back has an age rating of 4+. This indicates it is suitable for a wide range of users, from young learners to adults seeking cognitive enhancement.

### How often is Dual N-Back updated?

The latest version of Dual N-Back is 1.0.2, and it was last updated on June 27, 2026. This suggests regular maintenance and potential improvements to the application.

## Version history (last 3 releases)

### 1.0.2 — 2026-06-27

Bold new look — Dual N-Back gets the Arcade Lab treatment: a high-contrast, tactile redesign across every screen.

- NEW: Share your wins — post a results card with your level, streak, and accuracy straight to Instagram and friends
- Refreshed game, results, progress, and settings screens
- Smoother tile highlights and a snappier feel
- Bug fixes and performance improvements

No ads. No accounts. Fully offline and private. Thanks for training with us!

### 1.0.1 — 2026-06-25

What's new in 1.0.1

- Custom difficulty: set your own "promote at" and "demote below" accuracy thresholds in Settings to control how fast the level adapts.
- Fairer scoring: sitting idle or tapping every button no longer inflates your accuracy — only real target/non-target discrimination counts.
- Smoother highlight animation on the grid tiles.
- Fixed a grid flicker that could occur when "Show audio letter" was enabled.

### 1.0 — 2026-06-24

No release notes.

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All apps by Ahmed Sayed Mokhtar Mohamed: https://appshunter.io/developer/1470826267

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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 2026-08-13.*