# Engineering HandBook vs Car Engine and Suspension

The clearest difference is ads: Engineering HandBook at none against Car Engine and Suspension's shown. Engineering HandBook also leads on update cadence (every 2 weeks vs every 18 months) and monetization model (free vs ad-supported). Car Engine and Suspension's advantage is ratings volume (73 vs 4) and rating (4.2 vs 4.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Car Engine and Suspension holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Car Engine and Suspension has 73 ratings behind it against 4, so its average is the more settled of the two.

Engineering HandBook ships an update every 2 weeks, Car Engine and Suspension every 18 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Engineering HandBook | Car Engine and Suspension |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/engineering-handbook/id843746804/reviews) | **[4.2 (73 ratings)](https://appshunter.io/ios/app/car-engine-and-suspension/id6471146773/reviews)** |
| Number of ratings | 4 | **73** |
| Positive reviews | — | 62.5% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 18 months |
| Monetization | **Free** | Ad-supported |
| Size | 12 MB | 198 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Raghu Srinivas](https://appshunter.io/developer/843746807) | [Renzo Macedo](https://appshunter.io/developer/1403943580) |

## What reviewers say

### Engineering HandBook

[App page](https://appshunter.io/ios/app/engineering-handbook/id843746804)

Access essential engineering formulas and concepts on the go. This app covers materials, numbers, mechanics, components, and metal cutting operations, providing accurate calculations for various engineering tasks.

**Highlights:** Engineering formulas and calculations, Materials classification and properties, Basic and trigonometric calculations, Unit conversions, Gear drive formulas, Metal cutting operation calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Car Engine and Suspension

[App page](https://appshunter.io/ios/app/car-engine-and-suspension/id6471146773)

Explore detailed animated models of internal combustion engines and car suspension systems. Observe components in action, understand their functions, and experiment with suspension configurations to learn about automotive mechanics.

**Highlights:** Transparent internal combustion engine model, Animated suspension system visualization, Variable suspension system configuration, Slow-motion detail viewing, Component exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is Engineering HandBook free?

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

### Is Car Engine and Suspension free?

Car Engine and Suspension is free to download, with no in-app purchases.

### Which has better reviews, Engineering HandBook or Car Engine and Suspension?

Car Engine and Suspension is rated higher. Engineering HandBook averages 4.0 out of 5 from 4 ratings, while Car Engine and Suspension averages 4.2 from 73 ratings.

### Do Engineering HandBook or Car Engine and Suspension have ads?

Car Engine and Suspension shows ads; Engineering HandBook does not.

### Which is updated more often, Engineering HandBook or Car Engine and Suspension?

Engineering HandBook ships an update every 2 weeks, and Car Engine and Suspension every 18 months. Most recently, Engineering HandBook was updated on October 23, 2026 and Car Engine and Suspension 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.*