# Diffusion and osmosis vs Molecules AR

The clearest difference is device support: Diffusion and osmosis at 3 against Molecules AR's 1. Diffusion and osmosis also leads on price ($0.99 vs $1.99). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Diffusion and osmosis costs $0.99 and Molecules AR $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, Molecules AR every 20 months. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Diffusion and osmosis | Molecules AR |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 20 months** |
| Size | 40 MB | 27 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Diffusion and osmosis

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Molecules AR

[App page](https://appshunter.io/ios/app/molecules-ar/id1334256889)

**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 Molecules AR free?

Molecules AR costs $1.99, with no in-app purchases.

### Do Diffusion and osmosis or Molecules AR have ads?

Neither Diffusion and osmosis nor Molecules AR shows ads.

### Which is updated more often, Diffusion and osmosis or Molecules AR?

Diffusion and osmosis ships an update every 30 months, and Molecules AR every 20 months. Most recently, Diffusion and osmosis was updated on September 9, 2026 and Molecules AR on September 18, 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.*