# Internal Waves vs PenFinger

The clearest difference is in-app purchases: PenFinger at none against Internal Waves's 2. PenFinger also leads on ads (none vs shown). Internal Waves's advantage is update cadence (every 10 days vs every 5 months) and iOS requirement (13.0 vs 18.5). On price and device support there is nothing between them.

Both are free to download. Internal Waves sells 2 in-app purchases, starting at $2.99 per month. PenFinger asks for nothing beyond the download.

Internal Waves ships an update every 10 days, PenFinger every 5 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Internal Waves | PenFinger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/internal-waves-particle-flow/id6748045391/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 133 MB | 0 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Riley McKinnon](https://appshunter.io/developer/1824077312) | [EMIRHAN SIMSEK](https://appshunter.io/developer/1861446793) |

## What reviewers say

### Internal Waves

[App page](https://appshunter.io/ios/app/internal-waves-particle-flow/id6748045391)

Create interactive particle art that responds to touch and music. This mindfulness experience offers a calming way to express yourself with light and motion, perfect for relaxation or creative exploration. Features AR mode for painting in your real-world space.

**Highlights:** Interactive particle art creation, Music-reactive visuals, Augmented Reality (AR) mode, Multi-touch drawing, Customizable particle effects, Mindfulness and relaxation focus

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Particle Flow Premium–Monthly | $2.99 | per month |
| Particle Flow Premium – Yearly | $9.99 | per year |


### PenFinger

[App page](https://appshunter.io/ios/app/penfinger/id6757021735)

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

**In-app purchases:** none


## Frequently asked questions

### Is Internal Waves free?

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

### Is PenFinger free?

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

### Do Internal Waves or PenFinger have ads?

Internal Waves shows ads; PenFinger does not.

### Which is updated more often, Internal Waves or PenFinger?

Internal Waves ships an update every 10 days, and PenFinger every 5 months. Most recently, Internal Waves was updated on October 24, 2026 and PenFinger on October 25, 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.*