# Mechanical Engineer vs Hydraulic System Calculator

The clearest difference is in-app purchases: Hydraulic System Calculator at none against Mechanical Engineer's 3. Hydraulic System Calculator also leads on iOS requirement (14.0 vs 17.6). Mechanical Engineer's advantage is review sentiment (30% vs 0%) and rating (4.4 vs 4.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Mechanical Engineer sells 3 in-app purchases, starting at $0.99 per month. Hydraulic System Calculator asks for nothing beyond the download.

Mechanical Engineer holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews point the same way: 30% of Mechanical Engineer's written reviews are positive against 0% of Hydraulic System Calculator's.

Mechanical Engineer ships an update every 2 months, Hydraulic System Calculator every 7 months. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Mechanical Engineer | Hydraulic System Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (8 ratings)](https://appshunter.io/ios/app/mechanical-engineer/id327055140/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | **29.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 94 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) |

## What reviewers say

### Mechanical Engineer

[App page](https://appshunter.io/ios/app/mechanical-engineer/id327055140)

This app provides over 300 essential mechanical engineering formulas across various domains. It allows users to calculate, save, compare, and share results, aiding in project optimization and decision-making. Users can access a limited number of calculations for free, with a subscription unlocking full functionality.

**Highlights:** Over 300 mechanical engineering formulas, Covers diverse engineering domains, Save and compare formula results, Share calculation outcomes, Intuitive and practical interface, Regular updates based on user input

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Pro Quarterly | $0.99 | per 3 months |
| Pro Yearly | $2.99 | per year |


### Hydraulic System Calculator

[App page](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445)

Calculate key parameters for hydraulic cylinders, pumps, motors, and pipes. Design individual components, view formulas, and switch between metric and imperial units for precise engineering.

**Highlights:** Calculate cylinder, pump, and motor parameters, Design single/double-acting cylinders, View and switch units (Metric/Imperial), Calculate piping parameters, Dynamic result updates, Copy and share results

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Engineer free?

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

### Is Hydraulic System Calculator free?

Hydraulic System Calculator is free to download, with no in-app purchases.

### Which has better reviews, Mechanical Engineer or Hydraulic System Calculator?

Mechanical Engineer is rated higher. Mechanical Engineer averages 4.4 out of 5 from 8 ratings, while Hydraulic System Calculator averages 4.0 from 3 ratings.

### Do Mechanical Engineer or Hydraulic System Calculator have ads?

Neither Mechanical Engineer nor Hydraulic System Calculator shows ads.

### Which is updated more often, Mechanical Engineer or Hydraulic System Calculator?

Mechanical Engineer ships an update every 2 months, and Hydraulic System Calculator every 7 months. Most recently, Mechanical Engineer was updated on October 14, 2026 and Hydraulic System Calculator on September 30, 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.*