# Crab Coloring vs Concentration

The clearest difference is update cadence: Crab Coloring at every 4 days against Concentration's every 9 days. 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.

Crab Coloring ships an update every 4 days, Concentration every 9 days. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Crab Coloring | Concentration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (11 ratings)](https://appshunter.io/ios/app/concentration-old-school/id6752550348/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | — | Free |
| Size | 63 MB | 37 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Anh Le Tuan](https://appshunter.io/developer/1607468790) | [Neil Rohan](https://appshunter.io/developer/1522614743) |

## What reviewers say

### Crab Coloring

[App page](https://appshunter.io/ios/app/crab-coloring/id6748608834)

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

**In-app purchases:** none


### Concentration

[App page](https://appshunter.io/ios/app/concentration-old-school/id6752550348)

This game challenges your memory by matching pairs of tokens, revealing parts of a phonetic rebus puzzle. Enjoy solo play, local multiplayer, or online battles with friends. It's designed for fun and to sharpen focus and vocabulary.

**Highlights:** Memory token matching, Phonetic rebus puzzles, Solo, shared, and WiFi multiplayer modes, Nostalgic and icon token sets, Offline play capability, Smart timers for pacing

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

**In-app purchases:** none


## Frequently asked questions

### Is Crab Coloring free?

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

### Is Concentration free?

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

### Do Crab Coloring or Concentration have ads?

Neither Crab Coloring nor Concentration shows ads.

### Which is updated more often, Crab Coloring or Concentration?

Crab Coloring ships an update every 4 days, and Concentration every 9 days. Most recently, Crab Coloring was updated on November 5, 2026 and Concentration on October 30, 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.*