# Concentration Sushi vs Corporate Slave Solitaire

The clearest difference is update cadence: Corporate Slave Solitaire at weekly against Concentration Sushi's every 3 months. Concentration Sushi's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

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

Concentration Sushi ships an update every 3 months, Corporate Slave Solitaire weekly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Concentration Sushi | Corporate Slave Solitaire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/concentration-sushi/id458072561/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 95.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 132 MB | 57 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Qualia Systems Inc.](https://appshunter.io/developer/388873648) | [LFT Inc.](https://appshunter.io/developer/1776796858) |

## 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:** none


### Corporate Slave Solitaire

[App page](https://appshunter.io/ios/app/corporate-slave-solitaire/id6760183831)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentration Sushi free?

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

### Is Corporate Slave Solitaire free?

Corporate Slave Solitaire is free to download, with no in-app purchases.

### Do Concentration Sushi or Corporate Slave Solitaire have ads?

Both Concentration Sushi and Corporate Slave Solitaire show ads.

### Which is updated more often, Concentration Sushi or Corporate Slave Solitaire?

Concentration Sushi ships an update every 3 months, and Corporate Slave Solitaire weekly. Most recently, Concentration Sushi was updated on October 30, 2026 and Corporate Slave Solitaire on October 25, 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.*