# REO Mechanical Engineering vs Mechanical Components

The clearest difference is in-app purchases: REO Mechanical Engineering at none against Mechanical Components's 4. REO Mechanical Engineering also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). Mechanical Components's advantage is update cadence (every 7 months vs every 21 months). On price and ads there is nothing between them.

Both are free to download. Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. REO Mechanical Engineering asks for nothing beyond the download.

REO Mechanical Engineering ships an update every 21 months, Mechanical Components every 7 months. The most recent releases landed on September 17, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | REO Mechanical Engineering | Mechanical Components |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-components/id6738186476/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 452 MB | 49 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Rex Banggawan](https://appshunter.io/developer/1516403954) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### REO Mechanical Engineering

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

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Mechanical Components

[App page](https://appshunter.io/ios/app/mechanical-components/id6738186476)

Test your knowledge of mechanical components with interactive quizzes. Features high-quality images, instant feedback, and multiple difficulty levels to help you master engineering parts. Ideal for students, DIY enthusiasts, and professionals.

**Highlights:** Interactive quizzes on mechanical parts, High-quality component images, Instant feedback and facts, Multiple difficulty levels, Learn and master engineering components

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $7.99 | per 7 days |
| Month | $19.99 | per month |
| 6 months | $19.99 | per 6 months |
| Year | $29.99 | per year |


## Frequently asked questions

### Is REO Mechanical Engineering free?

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

### Is Mechanical Components free?

Mechanical Components is free to download, with in-app purchases available.

### Do REO Mechanical Engineering or Mechanical Components have ads?

Neither REO Mechanical Engineering nor Mechanical Components shows ads.

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

REO Mechanical Engineering ships an update every 21 months, and Mechanical Components every 7 months. Most recently, REO Mechanical Engineering was updated on September 17, 2026 and Mechanical Components on June 8, 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.*