# Sketch vs Number Brain

The clearest difference is in-app purchases: Sketch at none against Number Brain's 1. Sketch also leads on iOS requirement (10.0 vs 16.6). Number Brain's advantage is ads (none vs shown) and update cadence (every 4 weeks vs every 12 months). On price and device support there is nothing between them.

Both are free to download. Number Brain sells 1 one-off in-app purchase. Sketch asks for nothing beyond the download.

Sketch ships an update every 12 months, Number Brain every 4 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Sketch | Number Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sketch/id471609490/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 4 weeks** |
| Monetization | Ad-supported | — |
| Size | 26 MB | 53 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ABCiSoft](https://appshunter.io/developer/409799840) | [Gerard Grundy](https://appshunter.io/developer/714855075) |

## What reviewers say

### Sketch

[App page](https://appshunter.io/ios/app/sketch/id471609490)

This app offers a fun and easy-to-use painting experience with a variety of creative tools. Users can paint on their own photos, utilize special brush strokes, and add pre-designed characters. Save and share your artwork directly from the app.

**Highlights:** Multiple brush stroke types, Adjustable stroke size and color, Add pre-designed characters, Paint on personal photos, Save and share artwork, Print via AirPrint

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

**In-app purchases:** none


### Number Brain

[App page](https://appshunter.io/ios/app/number-brain/id1196440935)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Sketch free?

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

### Is Number Brain free?

Number Brain is free to download, with in-app purchases available.

### Do Sketch or Number Brain have ads?

Sketch shows ads; Number Brain does not.

### Which is updated more often, Sketch or Number Brain?

Sketch ships an update every 12 months, and Number Brain every 4 weeks. Most recently, Sketch was updated on October 7, 2026 and Number Brain on October 11, 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.*