# FlashNumbers：Train your memory — Remember Numbers and Train

> Memory and visual acuity training game with number memorization challenges. (iPhone/iPad app by Jun Koizumi.)

- Source: https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421 (this page in markdown: same URL + `.md`)
- Developer: [Jun Koizumi](https://appshunter.io/developer/1143108654)
- Category: Games, Entertainment, Casual, Family
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 52 MB
- Languages: Japanese
- Released: 2016-10-21
- Data updated: 2026-06-01
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421/reviews.md

## What is FlashNumbers：Train your memory?

【overview】
It is an application that challenges the limits of dynamic visual acuity and memory. By playing repeatedly, you can also train your dynamic visual acuity and memory.

It is a game to memorize and input the numbers displayed on the screen only for a moment. As you continue to answer correctly, the time displayed will decrease little by little. The game continues until you make a mistake.
Test your limits or use it to train your dynamic vision and memory.

We have prepared several difficulty levels, so please play with the difficulty level that suits you. We recommend that you start with the easy ones first.

You can post the results to various SNS by pressing the Share button on the result screen. Please share if you get good results. The app permissions require access to storage, but I'm using it to take screenshots for posting.

You can see the number of correct answers every day in a graph, so you can see how much you have improved.

【function】
There are 5 levels: Beginner, Elementary, Intermediate, Advanced and Advanced. Three numbers are displayed in the introductory. After that, it will increase by 1, and it will be 7 in special class.

・Tutorial function. We have tutorials for beginners. You can learn how to play while actually experiencing.
・You can see the record of each game.
・Changes in the number of clears for each difficulty level for 31 days are displayed in a graph.

【Operation instructions】
Enter a number using the numeric buttons on the lower left. If you want to erase one character, press Back. After entering, click OK to proceed.

【price】
You can play all for free.

## Key features

- Memorize and input numbers
- Dynamic visual acuity training
- Multiple difficulty levels
- Daily improvement graphs
- Tutorial for beginners
- Share results to SNS

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421/reviews.md

### 1/5 — 広告回数多すぎ

*2022-06-29, version 1.7*

出来るか出来ないかのギリギリなランクで挑戦するので広告が出すぎる。減らせばもっと継続して遊ぶ人増えると思う。

### 2/5 — 広告多々

*2020-08-24, version 1.3*

失敗すると広告表示。前はこんなに出なかったので残念です。

### 5/5 — こういうアプリ大好きです❤️

*2018-01-07, version 1.0*

脳トレにも活用させて頂いてます。

## Frequently asked questions about FlashNumbers：Train your memory

### What is FlashNumbers?

FlashNumbers is a game designed to train your dynamic visual acuity and memory. It challenges you to memorize and input numbers that are displayed on the screen for a very short time.

### How does FlashNumbers work?

You are shown a sequence of numbers for a brief moment and then must input them correctly using the on-screen numeric buttons. The game gets progressively harder as the display time decreases with each correct answer.

### Are there different difficulty levels in FlashNumbers?

Yes, FlashNumbers offers five difficulty levels: Beginner, Elementary, Intermediate, Advanced, and Special Class. You can choose the level that best suits your current abilities.

### Can I track my progress in FlashNumbers?

Absolutely. The app provides a graph that shows your number of correct answers each day for 31 days, allowing you to visualize your improvement over time.

### Is FlashNumbers free to play?

Yes, you can play all aspects of FlashNumbers for free. The app is supported by advertisements.

### Does FlashNumbers have ads?

Yes, FlashNumbers contains advertisements. These ads help support the development and free availability of the game.

### What devices is FlashNumbers available on?

FlashNumbers is available on iPhone, iPad, and iPod. It is designed for iOS devices.

### How often is FlashNumbers updated?

The latest version of FlashNumbers is 1.9, and it was last updated on June 27, 2023. Updates typically include bug fixes and performance improvements.

## Version history (last 5 releases)

### 1.9 — 2023-06-27

Review request

### 1.8 — 2023-06-19

Update libraries.

### 1.7 — 2020-10-05

ライブラリを更新しました。

### 1.3 — 2019-05-26

No release notes.

### 1.2 — 2018-11-12

No release notes.

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All apps by Jun Koizumi: https://appshunter.io/developer/1143108654

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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 2026-06-01.*