# Motion vs CloudLabs Density of Solids

The clearest difference is price: CloudLabs Density of Solids at Free against Motion's $0.99. CloudLabs Density of Solids also leads on device support (3 vs 1) and iOS requirement (9.0 vs 12.0). On update cadence, ads and in-app purchases there is nothing between them.

CloudLabs Density of Solids is free to download; Motion costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Motion ships an update every 34 months, CloudLabs Density of Solids every 29 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Motion | CloudLabs Density of Solids |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 29 months** |
| Size | 58 MB | 92 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### Motion

[App page](https://appshunter.io/ios/app/motion-physics/id1139665168)

**Features:** macOS Compatibility

**In-app purchases:** none


### CloudLabs Density of Solids

[App page](https://appshunter.io/ios/app/cloudlabs-density-of-solids/id1594450392)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Motion free?

Motion costs $0.99, with no in-app purchases.

### Is CloudLabs Density of Solids free?

CloudLabs Density of Solids is free to download, with no in-app purchases.

### Do Motion or CloudLabs Density of Solids have ads?

Neither Motion nor CloudLabs Density of Solids shows ads.

### Which is updated more often, Motion or CloudLabs Density of Solids?

Motion ships an update every 34 months, and CloudLabs Density of Solids every 29 months. Most recently, Motion was updated on October 26, 2026 and CloudLabs Density of Solids 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.*