# Hydraulic Engineer vs HydroCalc Plus

The clearest difference is review sentiment: HydroCalc Plus at 100% against Hydraulic Engineer's 25%. HydroCalc Plus also leads on rating (5.0 vs 4.0) and update cadence (every 3 weeks vs every 6 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Hydraulic Engineer costs $4.99 and HydroCalc Plus $3.99 up front. Hydraulic Engineer sells 1 one-off in-app purchase and HydroCalc Plus sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

HydroCalc Plus holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 25% of Hydraulic Engineer's written reviews are positive against 100% of HydroCalc Plus's.

Hydraulic Engineer ships an update every 6 months, HydroCalc Plus every 3 weeks. The most recent releases landed on September 26, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Hydraulic Engineer | HydroCalc Plus |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/hydraulic-engineer/id410465591/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-plus/id578807688/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 19 MB | 34 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) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## 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 |


### HydroCalc Plus

[App page](https://appshunter.io/ios/app/hydrocalc-plus/id578807688)

A professional tool for hydraulic engineers to calculate pressure losses in piping systems. It supports US and SI units, offers an extensive pipe material and fittings database, and includes inverse calculations for design optimization.

**Highlights:** Friction head loss calculation (Hazen-Williams), US and SI unit support, Extensive pipe material library, Fittings and valves database, Inverse calculation mode, Real-time results (velocity, losses)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pump Power Calculator | $1.99 | one-time |
| System Curve Generator | $1.99 | one-time |
| Pipe Database | $1.99 | one-time |
| Industrial Fluids Pack | $2.99 | one-time |


## Frequently asked questions

### Is Hydraulic Engineer free?

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

### Is HydroCalc Plus free?

HydroCalc Plus costs $3.99, and also offers in-app purchases.

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

HydroCalc Plus is rated higher. Hydraulic Engineer averages 4.0 out of 5 from 1 ratings, while HydroCalc Plus averages 5.0 from 1 ratings.

### Do Hydraulic Engineer or HydroCalc Plus have ads?

Neither Hydraulic Engineer nor HydroCalc Plus shows ads.

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

Hydraulic Engineer ships an update every 6 months, and HydroCalc Plus every 3 weeks. Most recently, Hydraulic Engineer was updated on September 26, 2026 and HydroCalc Plus on August 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*