# Hydraulic Engineer vs Hydraulic

The clearest difference is price: Hydraulic at Free against Hydraulic Engineer's $4.99. Hydraulic also leads on review sentiment (50% vs 25%) and update cadence (every 6 weeks vs every 6 months). On rating, ads, in-app purchases and device support there is nothing between them.

Hydraulic is free to download; Hydraulic Engineer costs $4.99 up front. Hydraulic Engineer sells 1 one-off in-app purchase and Hydraulic sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.0 for Hydraulic Engineer against 4.1 for Hydraulic. That said, the two scores are not equally well evidenced: Hydraulic has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 25% of Hydraulic Engineer's written reviews are positive against 50% of Hydraulic's.

Hydraulic Engineer ships an update every 6 months, Hydraulic every 6 weeks. The most recent releases landed on October 30, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Hydraulic Engineer | Hydraulic |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/hydraulic-engineer/id410465591/reviews) | **[4.1 (17 ratings)](https://appshunter.io/ios/app/hydraulic-calculator/id612615039/reviews)** |
| Number of ratings | 1 | **17** |
| Positive reviews | 25.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 19 MB | 24 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Zanthic Automation Inc.](https://appshunter.io/developer/574695320) |

## What reviewers say

### Hydraulic Engineer

[App page](https://appshunter.io/ios/app/hydraulic-engineer/id410465591)

This comprehensive calculator app offers over 1,000 hydraulic engineering formulas across 13 categories. It includes temperature conversions, reference tables, and the ability to save and share calculations. Works offline and supports both US Customary and SI Metric units.

**Highlights:** Over 1,000 hydraulic formulas, 13 specialized calculator categories, Temperature scale converters, Professional reference tables, Save and share calculations, Works offline, US Customary and SI Metric units

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydraulic Pro | $3.99 | one-time |


### Hydraulic

[App page](https://appshunter.io/ios/app/hydraulic-calculator/id612615039)

Perform essential hydraulic calculations for cylinders, pumps, and fluid lines. Solve for forces, speeds, torque, power, and pressure drop. Supports metric and imperial units, with advanced features unlocked via in-app purchase.

**Highlights:** Cylinder force and speed calculations, Pump displacement, flow, and pressure calculations, Hydraulic line fluid velocity and pressure drop, Orifice flow and pressure calculations, Speed, torque, and power calculations, Metric and imperial unit support, Copy results to clipboard

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $7.99 | one-time |
| Pro Version | $7.99 | one-time |


## Frequently asked questions

### Is Hydraulic Engineer free?

Hydraulic Engineer costs $4.99, and also offers in-app purchases.

### Is Hydraulic free?

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

### Which has better reviews, Hydraulic Engineer or Hydraulic?

Hydraulic is rated higher. Hydraulic Engineer averages 4.0 out of 5 from 1 ratings, while Hydraulic averages 4.1 from 17 ratings.

### Do Hydraulic Engineer or Hydraulic have ads?

Neither Hydraulic Engineer nor Hydraulic shows ads.

### Which is updated more often, Hydraulic Engineer or Hydraulic?

Hydraulic Engineer ships an update every 6 months, and Hydraulic every 6 weeks. Most recently, Hydraulic Engineer was updated on October 30, 2026 and Hydraulic on October 20, 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.*