# FLASH Calculation

> Mental arithmetic training app displaying numbers sequentially for recall. (iPhone/iPad app by yoshimitsu sakui.)

- Source: https://appshunter.io/ios/app/flash-calculation/id500486995 (this page in markdown: same URL + `.md`)
- Developer: [yoshimitsu sakui](https://appshunter.io/developer/500486998)
- Category: Education, Games, Family
- Price: Free
- Rating: 3.33/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 6.0 · 3 MB
- Languages: English, Japanese
- Released: 2012-02-11
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/flash-calculation/id500486995/reviews.md

## What is FLASH Calculation?

Mental arithmetic app is FLASH.
More iOS6: operating environment

The mental arithmetic the numbers displayed on the screen one after the other, right at the end, to determine an incorrect answer.

※ There is no official app of the Japan Association of flash mental calculation.

■ AppStore
http://itunes.apple.com/jp/app/flash-calculation/id500486995?ls=1&mt=8


You can set up the following topics I am available.

• The number of digits (digits 1-7)
• Speed ​​(in seconds 4.0,3.5,3.0,2.5,2.0,1.5,1.0,0.7,0.5,0.3, 0.2, 0.1)
• The number of questions (questions 5,10,20,30,50,100)


You can post the results on Twitter.

Let's train the brain and brain training in mental arithmetic FLASH!

## Key features

- Sequential number display
- Customizable number of digits
- Adjustable display speed
- Configurable number of questions
- Twitter result sharing
- Brain training exercises


## Frequently asked questions about FLASH Calculation

### What is FLASH Calculation?

FLASH Calculation is a mental arithmetic app designed to train your brain. It displays numbers sequentially, and users must recall them at the end of the sequence.

### How can I customize the training in FLASH Calculation?

You can customize the number of digits (1-7), the display speed (from 0.1 to 4.0 seconds), and the number of questions (5 to 100) to tailor the exercises to your needs.

### Can I share my results from FLASH Calculation?

Yes, you can post your results directly to Twitter after completing your mental arithmetic training sessions.

### What devices is FLASH Calculation compatible with?

FLASH Calculation is available for iPhone and iPod devices.

### What is the age rating for FLASH Calculation?

FLASH Calculation has an age rating of 4+.

### How often is FLASH Calculation updated?

The app was last updated on February 17, 2014, to version 3.0.1. It was initially released on February 11, 2012.

### Does FLASH Calculation have ads?

No, FLASH Calculation does not contain advertisements.

### What is the user rating for FLASH Calculation?

FLASH Calculation has an average rating of 3.3 stars based on 3 user ratings.

## Version history (last 5 releases)

### 3.0.1 — 2014-02-17

- Added font size setting 
- Added problem history button on the screen answer result 
- Added retry function

### 3.0.0 — 2014-02-06

- Fixed UI overall 
- Fixed bug that does not produce any sound 
- Add 0.1 seconds, 0.2 seconds to speed 
- Add history display 
- Added share Facebook, to LINE 
- Fixed minor bug

### 2.1 — 2012-11-03

- Fixed bug when entering a reply

### 2.0 — 2012-10-25

■ Revision History
2012/10/16: version2.0
• Supports, iPhone5 iOS6
• Improvements and to flush properly when the number is switched
• Expanded the maximum number of seconds to 4 seconds
• Improved UI settings screen, the reply screen

### 1.1 — 2012-03-10

・Same the digit continuing, correcting the trouble which is generated
・In addition trouble correction

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## More apps by yoshimitsu sakui

- [Font Checker - Display confirmation of UIFont](https://appshunter.io/ios/app/font-checker-display-confirmation-of-uifont/id813484205)

All apps by yoshimitsu sakui: https://appshunter.io/developer/500486998

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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 2026-06-10.*