# Mechanical Engineering Book vs Mechanical Components

The clearest difference is price: Mechanical Components at Free against Mechanical Engineering Book's $1.99. Mechanical Engineering Book's advantage is rating (4.7 vs 3.0) and in-app purchases (none vs 4). On update cadence and ads there is nothing between them.

Mechanical Components is free to download; Mechanical Engineering Book costs $1.99 up front. Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. Mechanical Engineering Book asks for nothing beyond the download.

Mechanical Engineering Book holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Mechanical Engineering Book has 12 ratings behind it against 2, so its average is the more settled of the two.

Mechanical Engineering Book ships an update every 11 months, Mechanical Components every 7 months. The most recent releases landed on September 9, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | Mechanical Engineering Book | Mechanical Components |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/mechanical-engineering-book/id6448752936/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-components/id6738186476/reviews) |
| Number of ratings | **12** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 7 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 38 MB | 49 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Haroon Khalil](https://appshunter.io/developer/1685448939) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### Mechanical Engineering Book

[App page](https://appshunter.io/ios/app/mechanical-engineering-book/id6448752936)

This app provides a comprehensive guide to mechanical engineering, covering fundamental concepts, key terms, and essential formulas. It's designed for students and professionals to deepen their understanding of machine mechanisms and engineering principles.

**Highlights:** Learn mechanical engineering principles, Understand machine mechanisms, Access engineering formulas and equations, Explore engineering facts, Covers thermodynamics, materials science, and more, Designed for professionals and students

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

**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 Mechanical Engineering Book free?

Mechanical Engineering Book costs $1.99, with no in-app purchases.

### Is Mechanical Components free?

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

### Which has better reviews, Mechanical Engineering Book or Mechanical Components?

Mechanical Engineering Book is rated higher. Mechanical Engineering Book averages 4.7 out of 5 from 12 ratings, while Mechanical Components averages 3.0 from 2 ratings.

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

Neither Mechanical Engineering Book nor Mechanical Components shows ads.

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

Mechanical Engineering Book ships an update every 11 months, and Mechanical Components every 7 months. Most recently, Mechanical Engineering Book was updated on September 9, 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.*