# N-Back Training — Daily Brain Training in 5 Min

> Daily Brain Training in 5 Min (iPhone/iPad app by chunson yamada.)

- Source: https://appshunter.io/ios/app/n/id1627478554 (this page in markdown: same URL + `.md`)
- Developer: [chunson yamada](https://appshunter.io/developer/1538754889)
- Category: Education, Games, Family, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 21 MB
- Languages: American English, Japanese
- Released: 2022-07-17
- Data updated: 2026-02-02
- User reviews in markdown: https://appshunter.io/ios/app/n/id1627478554/reviews.md

## What is N?

I wanted to play "Oni Keisan" on my iPhone!
  That's why I created this N-Back brain training app.

  What is this training?

  Solve calculations while remembering the answers from a few questions back.
  Juggling "memorizing" and "calculating" at the same time gives your brain a real
  workout.

  Features

  ◆ Two Input Modes
  - Tap Mode: Quickly tap the answer
  - Handwriting Mode: Write numbers directly

  ◆ Build Daily Habits
  - Set daily play goals
  - Track your streak
  - Record how you're feeling today

  ◆ Track Your Progress
  - Accuracy trends
  - Level-up history
  - Play history

  ◆ Customize Your Way
  - Adjust question count & time limits
  - 3 color themes
  - iPhone & iPad support

  Perfect For

  - Those who want to play Oni Keisan without a dedicated game console
  - Anyone looking for a quick mental exercise
  - People who want to build a daily habit

  Just 5 minutes a day. A casual brain training experience.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| １ヶ月プラン | $0.99 | per month |



## Version history (last 5 releases)

### 3.1.1 — 2026-02-01

ver3.1.1
- dark mode
- fix layout

### 3.1.0 — 2026-01-06

ver3.1.0
- Updated the graph layout on the Today and Review tabs.
- Fixed an issue where notifications were not displayed.

### 3.0.6 — 2025-12-19

v3.0.6

bug fixes

### 3.0.5 — 2025-12-16

ver 3.0.5
Fixed an issue where the number of questions could not be changed.
The default is 20 questions.
For N = 2 (2-back), this means remembering 2 initial items plus 20 questions.

### 3.0.4 — 2025-12-08

ver3.0.4

fix default problem count bugs

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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 2026-02-02.*