# NumColor AI vs Wooly Stack

The clearest difference is in-app purchases: Wooly Stack at none against NumColor AI's 10. Wooly Stack also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NumColor AI sells 10 in-app purchases, starting at $7.99 per 7 days. Wooly Stack asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | NumColor AI | Wooly Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (76 ratings)](https://appshunter.io/ios/app/numcolor-ai-coloring-games/id6753583850/reviews)** | — |
| Number of ratings | **76** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free with in-app purchases | — |
| Size | 134 MB | 112 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [PLAYCUS LIMITED](https://appshunter.io/developer/1451803459) | [Ngoc Thien Tran](https://appshunter.io/developer/1832974460) |

## What reviewers say

### NumColor AI

[App page](https://appshunter.io/ios/app/numcolor-ai-coloring-games/id6753583850)

This app offers a relaxing pixel art coloring experience by number. Users can choose from a variety of images, tap to fill in numbered cells with corresponding colors, and create satisfying pixel art masterpieces. It's designed for stress relief and creative expression, suitable for all skill levels.

**Highlights:** Intuitive tap-to-color gameplay, Regularly updated free coloring pages, Relaxing, no-timer anti-stress experience, Zoom and swipe for detailed coloring, Save and share finished artwork, Diverse categories of images

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NumColor Premium | $7.99 | per 7 days |
| Premium Subscription | $9.99 | per 7 days |
| NumColor Premium | $39.99 | per year |
| NumColor Premium | $49.99 | per year |
| 1 Gem | $0.99 | one-time |
| 110 Coins | $1.99 | one-time |
| 10 Gems | $4.99 | one-time |
| 30 Gems | $9.99 | one-time |
| 200 Gems | $49.99 | one-time |
| 500 Gems | $99.99 | one-time |


### Wooly Stack

[App page](https://appshunter.io/ios/app/wooly-stack/id6754236109)

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

**In-app purchases:** none


## Frequently asked questions

### Is NumColor AI free?

NumColor AI is free to download, with in-app purchases available.

### Is Wooly Stack free?

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

### Do NumColor AI or Wooly Stack have ads?

Both NumColor AI and Wooly Stack show ads.

### Which is updated more often, NumColor AI or Wooly Stack?

NumColor AI ships an update every 2 days, and Wooly Stack every 2 days. Most recently, NumColor AI was updated on October 30, 2026 and Wooly Stack 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.*