# Napier's Bones Simulation vs CloudLabs Linear Motion

The clearest difference is price: CloudLabs Linear Motion at Free against Napier's Bones Simulation's $1.99. CloudLabs Linear Motion also leads on iOS requirement (9.0 vs 12.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

CloudLabs Linear Motion is free to download; Napier's Bones Simulation costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Napier's Bones Simulation ships an update every 25 months, CloudLabs Linear Motion every 20 months. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Napier's Bones Simulation | CloudLabs Linear Motion |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 20 months** |
| Size | 29 MB | 69 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### Napier's Bones Simulation

[App page](https://appshunter.io/ios/app/napiers-bones-simulation/id1093899282)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CloudLabs Linear Motion

[App page](https://appshunter.io/ios/app/cloudlabs-linear-motion-rum/id1633089358)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Napier's Bones Simulation free?

Napier's Bones Simulation costs $1.99, with no in-app purchases.

### Is CloudLabs Linear Motion free?

CloudLabs Linear Motion is free to download, with no in-app purchases.

### Do Napier's Bones Simulation or CloudLabs Linear Motion have ads?

Neither Napier's Bones Simulation nor CloudLabs Linear Motion shows ads.

### Which is updated more often, Napier's Bones Simulation or CloudLabs Linear Motion?

Napier's Bones Simulation ships an update every 25 months, and CloudLabs Linear Motion every 20 months. Most recently, Napier's Bones Simulation was updated on September 23, 2026 and CloudLabs Linear Motion on September 10, 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.*