# Concentration Game, 9Bubbles vs 瞬間記憶

The clearest difference is review sentiment: 瞬間記憶 at 100% against Concentration Game, 9Bubbles's 55%. 瞬間記憶 also leads on in-app purchases (none vs 4). Concentration Game, 9Bubbles's advantage is update cadence (every 10 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Concentration Game, 9Bubbles sells 4 one-off in-app purchases. 瞬間記憶 asks for nothing beyond the download.

Concentration Game, 9Bubbles ships an update every 10 days, 瞬間記憶 every 2 months. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Concentration Game, 9Bubbles | 瞬間記憶 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (46 ratings)](https://appshunter.io/ios/app/concentration-game-9bubbles/id1366569537/reviews)** | — |
| Number of ratings | **46** | — |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 43 MB | 101 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lisfee, Inc.](https://appshunter.io/developer/1146331015) | [ZERONE](https://appshunter.io/developer/1708775781) |

## What reviewers say

### Concentration Game, 9Bubbles

[App page](https://appshunter.io/ios/app/concentration-game-9bubbles/id1366569537)

This game challenges your memory and concentration by requiring you to memorize and recall the colors and positions of bubbles. Designed to improve cognitive skills and creativity, it offers increasing difficulty across 28 stages.

**Highlights:** Memorize colors and positions, Burst bubbles based on memory, Improves memory power, Enhances creative ability, 28 challenging stages, Trains the right side of the brain

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FEEL GOOD | $1.99 | one-time |
| TRY STAGE28 | $1.99 | one-time |
| 10 LIFEs | $1.99 | one-time |
| DELETE ADs | $1.99 | one-time |


### 瞬間記憶

[App page](https://appshunter.io/ios/app/id1473696933)

A simple puzzle game designed to improve your memory and cognitive skills. Test your brain age by memorizing number patterns and tapping the correct sequence. Play regularly to activate your brain and see how sharp you are.

**Highlights:** Memory game with numbers, Brain age diagnosis, Simple tap controls, Brain activation through play, Puzzle gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentration Game, 9Bubbles free?

Concentration Game, 9Bubbles is free to download, with in-app purchases available.

### Is 瞬間記憶 free?

瞬間記憶 is free to download, with no in-app purchases.

### Do Concentration Game, 9Bubbles or 瞬間記憶 have ads?

Both Concentration Game, 9Bubbles and 瞬間記憶 show ads.

### Which is updated more often, Concentration Game, 9Bubbles or 瞬間記憶?

Concentration Game, 9Bubbles ships an update every 10 days, and 瞬間記憶 every 2 months. Most recently, Concentration Game, 9Bubbles was updated on October 22, 2026 and 瞬間記憶 on October 8, 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.*