# Automobile Engineering Book vs Mechanical Components

The clearest difference is rating: Automobile Engineering Book at 4.6 against Mechanical Components's 3.0. Automobile Engineering Book also leads on update cadence (every 5 weeks vs every 7 months) and ratings volume (9 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Automobile Engineering Book sells 4 in-app purchases, starting at $2.99 per 3 months and Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Automobile Engineering Book holds the better App Store score, 4.6 against 3.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

Automobile Engineering Book ships an update every 5 weeks, Mechanical Components every 7 months. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Automobile Engineering Book | Mechanical Components |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/automobile-engineering-book/id1583758958/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-components/id6738186476/reviews) |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 136 MB | 49 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oleksandr Pereshein](https://appshunter.io/developer/1041461209) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### Automobile Engineering Book

[App page](https://appshunter.io/ios/app/automobile-engineering-book/id1583758958)

This app provides a comprehensive yet accessible guide to automobile engineering. It covers basic vehicle structure, common malfunctions, and maintenance rules in a clear, engaging format with ample illustrations. Ideal for novice drivers and anyone seeking to understand their car better.

**Highlights:** Basic vehicle structure information, Common malfunctions and solutions, Operation and maintenance rules, Simple language explanations of car systems, Extensive illustrative material

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | per 3 months |
| Full version for three months | $2.99 | one-time |
| Full version for one year | $4.99 | one-time |
| Full version forever | $6.99 | one-time |


### 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 Automobile Engineering Book free?

Automobile Engineering Book is free to download, with in-app purchases available.

### Is Mechanical Components free?

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

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

Automobile Engineering Book is rated higher. Automobile Engineering Book averages 4.6 out of 5 from 9 ratings, while Mechanical Components averages 3.0 from 2 ratings.

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

Neither Automobile Engineering Book nor Mechanical Components shows ads.

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

Automobile Engineering Book ships an update every 5 weeks, and Mechanical Components every 7 months. Most recently, Automobile Engineering Book was updated on October 1, 2026 and Mechanical Components on October 2, 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.*