# N'Back Butterfly

> Improve working memory using the n-back task. (iPhone/iPad app by Yasuyoshi Ota.)

- Source: https://appshunter.io/ios/app/nback-butterfly/id853507894 (this page in markdown: same URL + `.md`)
- Developer: [Yasuyoshi Ota](https://appshunter.io/developer/1500357652)
- Category: Games, Education, Action, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 9 MB
- Languages: American English, Japanese
- Released: 2014-04-08
- Data updated: 2026-08-31
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/nback-butterfly/id853507894/reviews.md

## What is N'Back Butterfly?

Forget about forgetfulness!
Improve your memory!
Improve Working Memory using N'Back Butterfly.

The n-back task is a continuous performance task that is commonly used as an assessment in cognitive neuroscience to measure a part of working memory. The n-back was introduced by Wayne Kirchner in 1958.
[quoted from Wikipedia　2014-04-02]

## Key features

- Working memory improvement
- N-back task training
- Cognitive neuroscience assessment
- Continuous performance task

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/nback-butterfly/id853507894/reviews.md

### 5/5 — シンプルイズベスト

*2020-01-13*

頭の整理に大変ありがたいです。
操作やルールも思考の妨げにならず素晴らしいです。
イヤホン装着時に効果音をオフになる様にしていただける様でしたら嬉しく思います。

### 5/5 — 2pacはウエストサイド

*2018-01-27*

6pacは理想ですが、私のお腹は3pacです。
このアプリのおかげで脳が活性化してカロリーが勝手に消費され6pacになれば良いですが、そんな夢物語を真空pacしたいです

### 5/5 — 3パックあたりから脳に負荷がかかる

*2017-01-15*

面白いし、同じ会社からの数字版のよりもビジュアルが綺麗。
ただ、最初のパックのうちは簡単すぎて、何のゲームかわからないのが難点。
ただ、スコア達成数による条件解除で次のパックに進めるのは、目標が見えるため良いと思う。

### 5/5 — 好玩

*2016-06-22*

这是我玩过最好玩的nback游戏，特别希望开发人员能早点推出n=5+😊🙏

### 5/5 — 5'Back以降も欲しい

*2014-06-21*

良いトレーニングになります
5'Back以降も欲しいです

### 5/5 — 記憶力が試せる

*2014-05-16*

2バックでのプレイは緊張感があって面白い！

### 5/5 — 良い

*2014-04-21*

気軽に記憶力を鍛えられます。

### 5/5 — 好き

*2014-04-13*

記憶力を鍛えるために使わせてもらい楽しんでいます。3バックは慣れてしまいましたので5バックくらいまで追加してほしいです。

## Frequently asked questions about N'Back Butterfly

### What is N'Back Butterfly?

N'Back Butterfly is a game designed to improve your working memory. It uses the n-back task, a method commonly employed in cognitive neuroscience to assess and train memory.

### How does N'Back Butterfly improve memory?

It trains your working memory by presenting sequences of stimuli and requiring you to recall them after a specified delay. This continuous performance task challenges your brain's ability to hold and manipulate information.

### Is N'Back Butterfly free to play?

Yes, N'Back Butterfly is free to download and play. However, it does contain advertisements.

### Does N'Back Butterfly have ads?

Yes, N'Back Butterfly contains advertisements. These ads help support the development and availability of the free game.

### What devices can I play N'Back Butterfly on?

N'Back Butterfly is available for iPhone, iPad, and iPod devices, as indicated by its supported devices list.

### How often is N'Back Butterfly updated?

The latest version, 1.9.4, was last updated on October 27, 2025, suggesting regular updates to maintain and improve the application.

### What is the age rating for N'Back Butterfly?

N'Back Butterfly has an age rating of 4+, making it suitable for a wide range of users interested in cognitive training.

### Can I play N'Back Butterfly offline?

The provided information does not specify whether N'Back Butterfly supports offline play. It is recommended to check the app store listing for details on offline functionality.

## Version history (last 5 releases)

### 1.9.5 — 2026-08-26

performance improvement

### 1.9.4 — 2025-10-27

performance improvement

### 1.9.3 — 2024-02-22

performance improvement

### 1.9.2 — 2023-06-16

performance improvements

### 1.9.1 — 2022-05-04

performance improvement　
change ads

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## More apps by Yasuyoshi Ota

- [Kinetic Visual Acuity](https://appshunter.io/ios/app/kinetic-visual-acuity/id315045189)
- [Kinetic Visual Acuity Lite](https://appshunter.io/ios/app/kinetic-visual-acuity-lite/id319026009)
- [Amida Mikan](https://appshunter.io/ios/app/amida-mikan/id350563115)
- [Try Hairstyle Lite](https://appshunter.io/ios/app/try-hairstyle-lite/id350729683)
- [Amida Mikann](https://appshunter.io/ios/app/amida-mikann/id358691639)
- [2 Digit Multiplication](https://appshunter.io/ios/app/2-digit-multiplication/id395133470)

All apps by Yasuyoshi Ota: https://appshunter.io/developer/1500357652

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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 2026-08-31.*