# Concentration Game, 9Bubbles vs 瞬間記憶王

The clearest difference is in-app purchases: 瞬間記憶王 at none against Concentration Game, 9Bubbles's 4. 瞬間記憶王 also leads on ads (none vs shown). Concentration Game, 9Bubbles's advantage is iOS requirement (12.0 vs 17.0). On price, update cadence and device support there is nothing between them.

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

Concentration Game, 9Bubbles ships an update every 10 days, 瞬間記憶王 fortnightly. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Concentration Game, 9Bubbles | 瞬間記憶王 |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lisfee, Inc.](https://appshunter.io/developer/1146331015) | [SANWA Inc.](https://appshunter.io/developer/1878028373) |

## 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 |


### 瞬間記憶王

[App page](https://appshunter.io/ios/app/id6760735398)

**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 瞬間記憶王 free?

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

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

Concentration Game, 9Bubbles shows ads; 瞬間記憶王 does not.

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

Concentration Game, 9Bubbles ships an update every 10 days, and 瞬間記憶王 fortnightly. Most recently, Concentration Game, 9Bubbles was updated on October 22, 2026 and 瞬間記憶王 on October 16, 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.*