# Diffusion and osmosis vs Combination & Decomposition

The clearest difference is price: Diffusion and osmosis at $0.99 against Combination & Decomposition's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Diffusion and osmosis costs $0.99 and Combination & Decomposition $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Diffusion and osmosis ships an update every 30 months, Combination & Decomposition every 33 months. Both last shipped on September 9, 2026.

## The numbers

| Metric | Diffusion and osmosis | Combination & Decomposition |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 30 months** | Every 33 months |
| Size | 40 MB | 149 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## What reviewers say

### Diffusion and osmosis

[App page](https://appshunter.io/ios/app/diffusion-and-osmosis/id1199769507)

**Features:** macOS Compatibility

**In-app purchases:** none


### Combination & Decomposition

[App page](https://appshunter.io/ios/app/combination-and-decomposition/id1544403959)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Diffusion and osmosis free?

Diffusion and osmosis costs $0.99, with no in-app purchases.

### Is Combination & Decomposition free?

Combination & Decomposition costs $1.99, with no in-app purchases.

### Do Diffusion and osmosis or Combination & Decomposition have ads?

Neither Diffusion and osmosis nor Combination & Decomposition shows ads.

### Which is updated more often, Diffusion and osmosis or Combination & Decomposition?

Diffusion and osmosis ships an update every 30 months, and Combination & Decomposition every 33 months. Most recently, Diffusion and osmosis was updated on September 9, 2026 and Combination & Decomposition on September 9, 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.*