# Scratch Image vs Dunarium

The clearest difference is in-app purchases: Scratch Image at none against Dunarium's 1. Scratch Image also leads on update cadence (daily vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Dunarium sells 1 one-off in-app purchase. Scratch Image asks for nothing beyond the download.

Scratch Image ships an update daily, Dunarium every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Scratch Image | Dunarium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dunarium-moving-sand-art/id6791540187/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 66 MB |
| Requires iOS | 16.6 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Francesco Abbondo](https://appshunter.io/developer/882842549) | [Cardamon Inc](https://appshunter.io/developer/6789163256) |

## What reviewers say

### Scratch Image

[App page](https://appshunter.io/ios/app/scratch-image/id6748886103)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dunarium

[App page](https://appshunter.io/ios/app/dunarium-moving-sand-art/id6791540187)

Experience a calming sensory toy that transforms your device into a dynamic moving sand art picture. Interact with flowing sand and bubbles by tilting your phone or using touch gestures. Customize your creation with various shapes, colors, and effects for a personalized, relaxing experience.

**Highlights:** Tilt to control sand flow, Touch to interact with gel and sand, Customizable glass shapes, Vivid sand palettes and backdrops, Adjustable gravity and grain behavior, Sound and haptic feedback, Clip recording with sound mix

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Everything | $4.99 | one-time |


## Frequently asked questions

### Is Scratch Image free?

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

### Is Dunarium free?

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

### Do Scratch Image or Dunarium have ads?

Neither Scratch Image nor Dunarium shows ads.

### Which is updated more often, Scratch Image or Dunarium?

Scratch Image ships an update daily, and Dunarium every 3 weeks. Most recently, Scratch Image was updated on October 25, 2026 and Dunarium on October 24, 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.*