# Gear Design vs REO Mechanical Engineering

The clearest difference is price: REO Mechanical Engineering at Free against Gear Design's $2.99. REO Mechanical Engineering also leads on device support (3 vs 1). Gear Design's advantage is iOS requirement (9.3 vs 14.0). On update cadence, ads and in-app purchases there is nothing between them.

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

Gear Design ships an update every 12 months, REO Mechanical Engineering every 21 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Gear Design | REO Mechanical Engineering |
| --- | --- | --- |
| 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** | Every 21 months |
| Monetization | Paid | — |
| Size | 38 MB | 452 MB |
| Requires iOS | **9.3** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI](https://appshunter.io/developer/914295588) | [Rex Banggawan](https://appshunter.io/developer/1516403954) |

## 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


### REO Mechanical Engineering

[App page](https://appshunter.io/ios/app/reo-mechanical-engineering/id1616497471)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Gear Design free?

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

### Is REO Mechanical Engineering free?

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

### Do Gear Design or REO Mechanical Engineering have ads?

Neither Gear Design nor REO Mechanical Engineering shows ads.

### Which is updated more often, Gear Design or REO Mechanical Engineering?

Gear Design ships an update every 12 months, and REO Mechanical Engineering every 21 months. Most recently, Gear Design was updated on November 2, 2026 and REO Mechanical Engineering on November 7, 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.*