# Diffusion and osmosis vs Solubility Study

The clearest difference is price: Diffusion and osmosis at $0.99 against Solubility Study'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 Solubility Study $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, Solubility Study every 45 months. The most recent releases landed on October 12, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Diffusion and osmosis | Solubility Study |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 30 months** | Every 45 months |
| Size | 40 MB | 75 MB |
| Requires iOS | 12.0 | 12.0 |
| 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, Vision Pro support

**In-app purchases:** none


### Solubility Study

[App page](https://appshunter.io/ios/app/solubility-study-edutech-era/id1617442186)

**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 Solubility Study free?

Solubility Study costs $1.99, with no in-app purchases.

### Do Diffusion and osmosis or Solubility Study have ads?

Neither Diffusion and osmosis nor Solubility Study shows ads.

### Which is updated more often, Diffusion and osmosis or Solubility Study?

Diffusion and osmosis ships an update every 30 months, and Solubility Study every 45 months. Most recently, Diffusion and osmosis was updated on October 12, 2026 and Solubility Study on October 27, 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.*