# Auto Mechanic Bob vs Mechanical Engineering Book

The clearest difference is rating: Mechanical Engineering Book at 4.7 against Auto Mechanic Bob's 1.0. Mechanical Engineering Book also leads on update cadence (every 11 months vs every 103 months) and ratings volume (12 vs 1). Auto Mechanic Bob's advantage is price ($0.99 vs $1.99). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Auto Mechanic Bob costs $0.99 and Mechanical Engineering Book $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mechanical Engineering Book holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Mechanical Engineering Book has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Auto Mechanic Bob ships an update every 103 months, Mechanical Engineering Book every 11 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Auto Mechanic Bob | Mechanical Engineering Book |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/auto-mechanic-bob-engines/id870140455/reviews) | **[4.7 (12 ratings)](https://appshunter.io/ios/app/mechanical-engineering-book/id6448752936/reviews)** |
| Number of ratings | 1 | **12** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 103 months | **Every 11 months** |
| Monetization | Paid | Paid |
| Size | 20 MB | 38 MB |
| Requires iOS | 13.1 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Michael OMassey](https://appshunter.io/developer/467921979) | [Haroon Khalil](https://appshunter.io/developer/1685448939) |

## What reviewers say

### Auto Mechanic Bob

[App page](https://appshunter.io/ios/app/auto-mechanic-bob-engines/id870140455)

Explore different types of engines with interactive animations and sounds. Test your knowledge with quizzes and practice diagnosing and fixing engine problems to earn certificates.

**Highlights:** Interactive engine animations, Engine repair challenges, Extensive engine quiz, Starting system information, Engine forums, Printable certificates

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Auto Mechanic Bob free?

Auto Mechanic Bob costs $0.99, with no in-app purchases.

### Is Mechanical Engineering Book free?

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

### Which has better reviews, Auto Mechanic Bob or Mechanical Engineering Book?

Mechanical Engineering Book is rated higher. Auto Mechanic Bob averages 1.0 out of 5 from 1 ratings, while Mechanical Engineering Book averages 4.7 from 12 ratings.

### Do Auto Mechanic Bob or Mechanical Engineering Book have ads?

Neither Auto Mechanic Bob nor Mechanical Engineering Book shows ads.

### Which is updated more often, Auto Mechanic Bob or Mechanical Engineering Book?

Auto Mechanic Bob ships an update every 103 months, and Mechanical Engineering Book every 11 months. Most recently, Auto Mechanic Bob was updated on October 20, 2026 and Mechanical Engineering Book on October 24, 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.*