# FlashNumbers：Train your memory vs Concentration Game

The clearest difference is review sentiment: Concentration Game at 100% against FlashNumbers：Train your memory's 33%. Concentration Game also leads on update cadence (every 5 months vs every 17 months) and ratings volume (21 vs 1). FlashNumbers：Train your memory's advantage is rating (5.0 vs 4.6) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FlashNumbers：Train your memory holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Concentration Game has 21 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 33% of FlashNumbers：Train your memory's written reviews are positive against 100% of Concentration Game's, so the app with the better star average is not the one people write more warmly about.

FlashNumbers：Train your memory ships an update every 17 months, Concentration Game every 5 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | FlashNumbers：Train your memory | Concentration Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421/reviews)** | [4.6 (21 ratings)](https://appshunter.io/ios/app/concentration-game-solo/id1616382609/reviews) |
| Number of ratings | 1 | **21** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 17 months | **Every 5 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 52 MB | 103 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jun Koizumi](https://appshunter.io/developer/1143108654) | [Hirokazu Uno](https://appshunter.io/developer/1570016990) |

## What reviewers say

### FlashNumbers：Train your memory

[App page](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421)

This game challenges your visual acuity and memory by having you memorize and input numbers shown briefly on screen. Progress through increasing difficulty levels and track your daily improvements with graphs. Share your high scores on social media.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Concentration Game

[App page](https://appshunter.io/ios/app/concentration-game-solo/id1616382609)

A classic single-player card game where you match pairs of numbers. The challenge increases with a decreasing time limit as you advance through levels. Enjoy a brain-training experience with this solo card game.

**Highlights:** Single-player card game, Match numbered pairs, Time limit decreases with level, Brain training, Classic card game mechanics

**In-app purchases:** none


## Frequently asked questions

### Is FlashNumbers：Train your memory free?

FlashNumbers：Train your memory is free to download, with no in-app purchases.

### Is Concentration Game free?

Concentration Game is free to download, with no in-app purchases.

### Which has better reviews, FlashNumbers：Train your memory or Concentration Game?

FlashNumbers：Train your memory is rated higher. FlashNumbers：Train your memory averages 5.0 out of 5 from 1 ratings, while Concentration Game averages 4.6 from 21 ratings.

### Do FlashNumbers：Train your memory or Concentration Game have ads?

Both FlashNumbers：Train your memory and Concentration Game show ads.

### Which is updated more often, FlashNumbers：Train your memory or Concentration Game?

FlashNumbers：Train your memory ships an update every 17 months, and Concentration Game every 5 months. Most recently, FlashNumbers：Train your memory was updated on October 24, 2026 and Concentration Game on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*