# Ink Marbling vs Pen15!

The clearest difference is update cadence: Ink Marbling at every 4 days against Pen15!'s fortnightly. On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Ink Marbling against 5.0 for Pen15!. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Ink Marbling ships an update every 4 days, Pen15! fortnightly. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Ink Marbling | Pen15! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/ink-marbling/id6739265121/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/pen15/id6758732596/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free | Free |
| Size | 5 MB | 4 MB |
| Requires iOS | **17.5** | 18.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Matthew Szenher](https://appshunter.io/developer/302873671) | [Alexander Collins](https://appshunter.io/developer/1874651756) |

## What reviewers say

### Ink Marbling

[App page](https://appshunter.io/ios/app/ink-marbling/id6739265121)

Explore the ancient Japanese art of suminagashi on your iOS device. Create unique marbled patterns by interacting with a digital canvas, simulating ink on water. Save your designs as high-resolution digital art.

**Highlights:** Simulate ink flow on water, Multiple interaction modes, Customizable brush sizes and colors, Dynamic visual effects, Save and share creations, High-resolution image export

**Features:** macOS Compatibility

**In-app purchases:** none


### Pen15!

[App page](https://appshunter.io/ios/app/pen15/id6758732596)

Unleash your creativity with a digital sketchbook designed for fun. Explore a variety of unique pens to bring your artistic visions to life.

**Highlights:** Digital sketchbook, Variety of fun pens, Creative sketching tool, Intuitive interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Ink Marbling free?

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

### Is Pen15! free?

Pen15! is free to download, with no in-app purchases.

### Which has better reviews, Ink Marbling or Pen15!?

Ink Marbling and Pen15! are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Ink Marbling or Pen15! have ads?

Neither Ink Marbling nor Pen15! shows ads.

### Which is updated more often, Ink Marbling or Pen15!?

Ink Marbling ships an update every 4 days, and Pen15! fortnightly. Most recently, Ink Marbling was updated on October 21, 2026 and Pen15! on October 16, 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.*