# Crazy 8s vs Concentration

The clearest difference is update cadence: Crazy 8s at every 2 months against Concentration's every 8 months. Crazy 8s also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Crazy 8s ships an update every 2 months, Concentration every 8 months. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Crazy 8s | Concentration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (387 ratings)](https://appshunter.io/ios/app/crazy-8s/id466005002/reviews)** | — |
| Number of ratings | **387** | — |
| Positive reviews | 63.2% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Ad-supported | — |
| Size | 18 MB | 117 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [fishdog.net](https://appshunter.io/developer/337519299) | [Mitsuaki Tanabe](https://appshunter.io/developer/987215117) |

## What reviewers say

### Crazy 8s

[App page](https://appshunter.io/ios/app/crazy-8s/id466005002)

Experience a fast-paced card game against three AI opponents. Match cards by number, letter, or color, or use an 8 card to change the suit. Explore additional rules for varied gameplay.

**Highlights:** Play against 3 computer opponents, Match number, letter, or color, Use 8 cards to switch colors, Play with Mau Mau rules, Includes special cards (Lose a Turn, Take a Card, Switchback)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Good game
- 🚀 Fast gameplay
- 💡 Includes Mau Mau variation
- 🎨 Nice design and colors

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🕰️ Slow after recent update
- 🔊 Preferences not saved
- 🤖 Feels rigged or AI-driven

**Reported bugs**

- Game doesn't reset properly after winning
- Incorrect card behavior (e.g. 8s as first card)
- Difficulty distinguishing card colors

**Requested features**

- Adjustable game speed
- Manual card selection
- Multiplayer support
- Scoring and statistics


### Concentration

[App page](https://appshunter.io/ios/app/concentration-card-game/id6670733657)

**In-app purchases:** none


## Frequently asked questions

### Is Crazy 8s free?

Crazy 8s is free to download, with no in-app purchases.

### Is Concentration free?

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

### Do Crazy 8s or Concentration have ads?

Both Crazy 8s and Concentration show ads.

### Which is updated more often, Crazy 8s or Concentration?

Crazy 8s ships an update every 2 months, and Concentration every 8 months. Most recently, Crazy 8s was updated on September 19, 2026 and Concentration on September 10, 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.*