# N-Back Training: Mental Math — Remember while you calculate

> Remember while you calculate (iPhone/iPad app by chunson yamada.)

- Source: https://appshunter.io/ios/app/n-back-training-mental-math/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 · 28 MB
- Languages: American English, Japanese
- Released: 2022-07-17
- Data updated: 2026-11-12

## What is N?

Equations keep coming, and you answer the one you saw a few turns ago while calculating the next.
Memorising and calculating at the same time, a dual task that keeps your head working.
This is the N-back task, a working memory exercise.

SLEEP & SCORE (APPLE HEALTH)
- Reads sleep and steps from Apple Health. "Sleep & Score" in the Review tab shows last night's sleep, today's steps, and your accuracy by how long you slept
- "What Health reveals" answers questions from your own records, such as how many hours of sleep make you sharpest and how far two short nights pull your score down (Premium)
- Saves how your mind feels after each round to Apple Health as State of Mind
- Health data stays on this device and is never sent anywhere. Not for medical use

KNOW YOUR MENTAL CONDITION
- After every round, slide along a color band to record how your mind feels, from foggy to clear
- "When your mind feels clear" ranks when you most often feel clear, such as mornings, your first round of the day, or after a break
- "Mood and score" plots each round so you can check whether clearer rounds score higher


THREE INPUT MODES
- Tap: answer quickly with number buttons
- Writing: write the digit on screen with your finger
- Listening: the equation is read aloud and never shown. Keep your eyes closed, listen, remember, and write

BUILT FOR HABIT
- One short session a day
- Streak counting
- Record how your head feels after each session

WHAT YOU LEAVE BEHIND
- A graph of how far up the levels you have climbed
- The hours you tend to practise, and total time
- A calendar showing which days you played

WHERE YOU STAND
- Connect Game Center to see your rank in the world
- Today, this week, and all time
- Ranks are free for everyone

INSIGHTS
- Once enough sessions pile up, the app names a pattern you would not notice yourself
- Accuracy runs higher on mornings; a level you lost tends to return after a rest day
- Differences between levels are factored out, so moving up alone is never called "doing well"
- Available on devices with Apple Intelligence, processed entirely on device

MAKE IT YOURS
- Set the number of questions and the time limit
- Choose a starting level, up to the highest you have reached
- Three colour themes
- iPhone and iPad

1 5 minutes a day is enough to start.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://note.com/toastar/n/n9e6b03d99470

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| １ヶ月プラン | $7.49 | per month |


## Is N safe?

Not enough ratings yet to assess N.

## Is N legit?

N-Back Training: Mental Math appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for N is 78 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 3.3.0 — 2026-11-10

See how sharp you are today, compared with your usual.

- New "Measure" in Review: today's accuracy compared with your own last two weeks at the same level, shown as "+6 vs. your usual"
- New "What you took & how you did": in the sheet after you play, mark what you took before the session (supplements, caffeine and so on) and see days taken and not taken side by side as dots
- Medications and caffeine you log in Apple Health can become marks automatically (Premium)
- A new Shortcuts action shows your past week at a glance (Siri phrases are in Japanese for now)
- The sheet after you play is easier to read, with Save at the bottom

### 3.2.1 — 2026-11-08

We rebuilt Review and the daily round.

- New "Sleep & Score" in Review: reads sleep and steps from Apple Health and compares your accuracy by how long you slept. "What Health reveals" answers questions like how many hours of sleep make you sharpest
- Today, Review and Settings now make better use of the larger screens on iPad and iPhone Duo
- A new Review tab: your monthly chart, a calendar of the days you played, and insights on one screen
- "World" now has a spinning globe and rankings for today, this week, and all time
- Listening mode: audio plays even in silent mode, and reading and pacing are steadier
- After every round, note how your mind feels by sliding along a color band
- Change the number of questions per round in Settings (rankings count 20-question rounds only)
- New "When your mind feels clear" in Review: see when you most often feel clear, such as mornings or after a break
- New "Mood and score" in Review: each round is plotted so you can see whether clearer rounds score higher
- Get a one-line insight from your records that you might not notice yourself (devices with Apple Intelligence)
- Share your result as a card image
- To play again, watch an ad to get a ticket
- On days with low accuracy, your level now goes down by one, as the result screen says
- Fixed many bugs, including the answer card flipping back to "?" too early

### 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

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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 2026-11-12.*