# Gear Design vs Dirac equation

The clearest difference is price: Dirac equation at Free against Gear Design's $2.99. Gear Design's advantage is iOS requirement (9.3 vs 17). On ads, in-app purchases and device support there is nothing between them.

Dirac equation is free to download; Gear Design costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Gear Design | Dirac equation |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/gear-design/id1136191442/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | — |
| Monetization | Paid | — |
| Size | 38 MB | 5 MB |
| Requires iOS | **9.3** | 17 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI](https://appshunter.io/developer/914295588) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Gear Design

[App page](https://appshunter.io/ios/app/gear-design/id1136191442)

Design involute gears with a CAD interface, allowing visual assessment through touch gestures. Generate and export STL data for 3D printing and perform tooth bending strength analysis with PDF sharing.

**Highlights:** Involute gear design, CAD interface, Touch gesture controls (zoom, rotate), STL data generation, Email export, Tooth bending strength analysis, PDF sharing

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

**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 Gear Design free?

Gear Design costs $2.99, with no in-app purchases.

### Is Dirac equation free?

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

### Do Gear Design or Dirac equation have ads?

Neither Gear Design nor Dirac equation 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.*