# Mechanical Formula vs Mechanical Engineering Book

The clearest difference is price: Mechanical Formula at Free against Mechanical Engineering Book's $1.99. Mechanical Formula also leads on update cadence (every 4 months vs every 11 months). Mechanical Engineering Book's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 13.0). On rating, ratings volume, ads and device support there is nothing between them.

Mechanical Formula is free to download; Mechanical Engineering Book costs $1.99 up front. Mechanical Formula sells 1 one-off in-app purchase. Mechanical Engineering Book asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Mechanical Formula against 4.7 for Mechanical Engineering Book. Both are backed by a comparable volume of ratings — 34 and 12 respectively.

Mechanical Formula ships an update every 4 months, Mechanical Engineering Book every 11 months. The most recent releases landed on October 1, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Mechanical Formula | Mechanical Engineering Book |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.7 (34 ratings)](https://appshunter.io/ios/app/mechanical-formula/id1668948373/reviews) | [4.7 (12 ratings)](https://appshunter.io/ios/app/mechanical-engineering-book/id6448752936/reviews) |
| Number of ratings | **34** | 12 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 42 MB | 38 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Haroon Khalil](https://appshunter.io/developer/1685448939) |

## What reviewers say

### Mechanical Formula

[App page](https://appshunter.io/ios/app/mechanical-formula/id1668948373)

This app provides over 200 essential mechanical engineering formulas and calculations in a user-friendly tool. It's designed to simplify complex concepts and speed up problem-solving for students, professionals, and educators.

**Highlights:** 200+ mechanical engineering formulas, Instant calculations, Intuitive interface, Real-world application explanations, Exam preparation aid, Lifetime Premium option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


### 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 Mechanical Formula free?

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

### Is Mechanical Engineering Book free?

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

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

Mechanical Formula and Mechanical Engineering Book are both rated 4.7 out of 5 on the App Store, from 34 and 12 ratings respectively.

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

Neither Mechanical Formula nor Mechanical Engineering Book shows ads.

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

Mechanical Formula ships an update every 4 months, and Mechanical Engineering Book every 11 months. Most recently, Mechanical Formula was updated on October 1, 2026 and Mechanical Engineering Book on September 27, 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.*