# Phys 1 vs Osmosis and Diffusion

The clearest difference is iOS requirement: Phys 1 at 9.0 against Osmosis and Diffusion's 12.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Phys 1 | Osmosis and Diffusion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (15 ratings)](https://appshunter.io/ios/app/phys-1/id1249860978/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free | — |
| Size | 659 MB | 27 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Geoffrey Musick](https://appshunter.io/developer/1249860977) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Phys 1

[App page](https://appshunter.io/ios/app/phys-1/id1249860978)

Engage in a physics-based puzzle adventure where you solve problems using specialized tools. Experience rapid feedback to learn and adapt, with randomized obstacles ensuring unique challenges. Explore concepts like kinematics, free fall, and projectiles.

**Highlights:** Physics-based puzzle solving, Kinematics tools (time, displacement, velocity), Drag-and-drop equation solver, Free fall and projectile exploration, Randomized obstacles for replayability, Experiential learning feedback

**Features:** macOS Compatibility

**In-app purchases:** none


### Osmosis and Diffusion

[App page](https://appshunter.io/ios/app/osmosis-and-diffusion/id6744108717)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Phys 1 free?

Phys 1 is free to download, with no in-app purchases.

### Is Osmosis and Diffusion free?

Osmosis and Diffusion is free to download, with no in-app purchases.

### Do Phys 1 or Osmosis and Diffusion have ads?

Neither Phys 1 nor Osmosis and Diffusion shows ads.

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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.*