# Hydraulic Troubleshooting vs Mechanical Engineering Book

The clearest difference is price: Hydraulic Troubleshooting at Free against Mechanical Engineering Book's $1.99. Hydraulic Troubleshooting also leads on rating (5.0 vs 4.7) and update cadence (every 4 months vs every 11 months). Mechanical Engineering Book's advantage is ratings volume (12 vs 2). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Hydraulic Troubleshooting is free to download; Mechanical Engineering Book costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hydraulic Troubleshooting holds the better App Store score, 5.0 against 4.7. 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.

Hydraulic Troubleshooting ships an update every 4 months, Mechanical Engineering Book every 11 months. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Hydraulic Troubleshooting | Mechanical Engineering Book |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hydraulic-troubleshooting/id1174078924/reviews)** | [4.7 (12 ratings)](https://appshunter.io/ios/app/mechanical-engineering-book/id6448752936/reviews) |
| Number of ratings | 2 | **12** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | **Free** | Paid |
| Size | 83 MB | 38 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Brendan Casey](https://appshunter.io/developer/1605685664) | [Haroon Khalil](https://appshunter.io/developer/1685448939) |

## What reviewers say

### Hydraulic Troubleshooting

[App page](https://appshunter.io/ios/app/hydraulic-troubleshooting/id1174078924)

This app guides users through diagnosing and solving hydraulic equipment problems. It utilizes process flow diagrams, text, and video to ensure accurate and efficient troubleshooting for mechanics and technicians.

**Highlights:** Guided troubleshooting process, Process flow diagrams, Text-based guidance, Video tutorials, Accurate diagnosis, Time-efficient solutions

**Features:** macOS Compatibility

**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 Hydraulic Troubleshooting free?

Hydraulic Troubleshooting is free to download, 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, Hydraulic Troubleshooting or Mechanical Engineering Book?

Hydraulic Troubleshooting is rated higher. Hydraulic Troubleshooting averages 5.0 out of 5 from 2 ratings, while Mechanical Engineering Book averages 4.7 from 12 ratings.

### Do Hydraulic Troubleshooting or Mechanical Engineering Book have ads?

Neither Hydraulic Troubleshooting nor Mechanical Engineering Book shows ads.

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

Hydraulic Troubleshooting ships an update every 4 months, and Mechanical Engineering Book every 11 months. Most recently, Hydraulic Troubleshooting was updated on October 5, 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.*