# N-Back Brain Trainer — Science-based brain training

> Science-based brain training (iPhone/iPad app by Toru Fukui.)

- Source: https://appshunter.io/ios/app/n-back-brain-trainer/id6761675343 (this page in markdown: same URL + `.md`)
- Developer: [Toru Fukui](https://appshunter.io/developer/1888097145)
- Category: Education, Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, Japanese
- Released: 2026-04-15
- Data updated: 2026-06-06
- User reviews in markdown: https://appshunter.io/ios/app/n-back-brain-trainer/id6761675343/reviews.md

## What is N?

A daily training app based on the N-Back task, widely used in cognitive psychology research. Challenge your working memory with just 5 minutes a day.

◆ 3 TRAINING MODES
• Single — Position: Memorize lit positions on a 3×3 grid
• Single — Audio: Remember spoken letters via text-to-speech
• Dual — Position + Audio: Train both at the same time for the ultimate challenge

◆ TRACK YOUR GROWTH
• Accuracy trend chart and session history
• Highest N-level reached
• Streak counter to build a daily habit

◆ COMPETE & ACHIEVE
• Game Center leaderboards: accuracy, max N-level, streak
• 8 achievements from your first session to 30-day streaks

◆ DESIGNED FOR FOCUS
• Zero ads during training — your concentration comes first
• Clean, minimal interface inspired by fitness tracking tools
• iCloud sync across all your devices

◆ SIMPLE PRICING
• Free to use with occasional ads (never during training)
• One-time purchase of $3.99 to remove all ads — no subscriptions, no hidden fees

◆ ADJUSTABLE DIFFICULTY
• N-1 to N-9: start easy and progress at your own pace
• Suitable for students, professionals, and anyone looking to challenge their cognitive abilities

Note: This app is a cognitive training tool based on the N-Back task used in research. It is not a medical device and does not diagnose, treat, or prevent any condition. Improvement in cognitive function is not guaranteed.


## Version history (last 1 release)

### 1.0 — 2026-04-15

No release notes.

## More apps by Toru Fukui

- [Who Looks Older?](https://appshunter.io/ios/app/who-looks-older/id6761515164)

All apps by Toru Fukui: https://appshunter.io/developer/1888097145

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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 2026-06-06.*