# Mechanical Pendulums vs Dirac equation

The clearest difference is device support: Dirac equation at 2 against Mechanical Pendulums's —. Mechanical Pendulums's advantage is iOS requirement (15.0 vs 17). On price and in-app purchases 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 | Mechanical Pendulums | Dirac equation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Size | 0 MB | 5 MB |
| Requires iOS | **15.0** | 17 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ManneTroll Solutions](https://appshunter.io/developer/313743954) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Mechanical Pendulums

[App page](https://appshunter.io/ios/app/mechanical-pendulums/id377376047)

**In-app purchases:** none


### Dirac equation

[App page](https://appshunter.io/ios/app/dirac-equation/id6739155551)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Pendulums free?

Mechanical Pendulums is free to download, with no in-app purchases.

### Is Dirac equation free?

Dirac equation is free to download, with no in-app purchases.

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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.*