# Concentration Sushi vs Hamster Memory Game

The clearest difference is rating: Hamster Memory Game at 5.0 against Concentration Sushi's 4.0. Hamster Memory Game also leads on in-app purchases (none vs 2) and ads (none vs shown). Concentration Sushi's advantage is update cadence (every 3 months vs every 16 months). On price, review sentiment, ratings volume and device support there is nothing between them.

Both are free to download. Concentration Sushi sells 2 one-off in-app purchases. Hamster Memory Game asks for nothing beyond the download.

Hamster Memory Game holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 95% of Concentration Sushi's written reviews are positive against 100% of Hamster Memory Game's.

Concentration Sushi ships an update every 3 months, Hamster Memory Game every 16 months. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Concentration Sushi | Hamster Memory Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/concentration-sushi/id458072561/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hamster-memory-game/id1180413199/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 95.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 16 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 132 MB | 116 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Qualia Systems Inc.](https://appshunter.io/developer/388873648) | [Toshikazu Fukuoka](https://appshunter.io/developer/953517028) |

## What reviewers say

### Concentration Sushi

[App page](https://appshunter.io/ios/app/concentration-sushi/id458072561)

Enhance your focus with this memory-based game. Test your recall by matching sushi cards with varying storage times across multiple difficulty levels. Compete with friends via Game Center.

**Highlights:** Memory card matching, Multiple game modes, Adjustable card storage times, Game Center integration, Infinite mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| V.S.Mode | $0.99 | one-time |
| No Ads | $3.99 | one-time |


### Hamster Memory Game

[App page](https://appshunter.io/ios/app/hamster-memory-game/id1180413199)

Engage in a simple yet fun memory matching game featuring adorable hamster images. Flip cards to find matching pairs and compete against an opponent to collect the most pairs and unlock special hamster pictures.

**Highlights:** Memory card matching gameplay, Cute hamster photos, Single-player vs. computer mode, Unlockable hamster pictures, In-game album to view collected photos

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentration Sushi free?

Concentration Sushi is free to download, with in-app purchases available.

### Is Hamster Memory Game free?

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

### Which has better reviews, Concentration Sushi or Hamster Memory Game?

Hamster Memory Game is rated higher. Concentration Sushi averages 4.0 out of 5 from 2 ratings, while Hamster Memory Game averages 5.0 from 2 ratings.

### Do Concentration Sushi or Hamster Memory Game have ads?

Concentration Sushi shows ads; Hamster Memory Game does not.

### Which is updated more often, Concentration Sushi or Hamster Memory Game?

Concentration Sushi ships an update every 3 months, and Hamster Memory Game every 16 months. Most recently, Concentration Sushi was updated on October 20, 2026 and Hamster Memory Game on October 7, 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.*