# EngineCalc vs Hydraulic Calculator Engineer

The clearest difference is review sentiment: EngineCalc at 60% against Hydraulic Calculator Engineer's 0%. EngineCalc also leads on update cadence (every 2 months vs every 22 months) and iOS requirement (6.0 vs 15.0). Hydraulic Calculator Engineer's advantage is price (Free vs $0.99) and rating (4.3 vs 2.3). On ads, in-app purchases and device support there is nothing between them.

Hydraulic Calculator Engineer is free to download; EngineCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hydraulic Calculator Engineer holds the better App Store score, 4.3 against 2.3. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews complicate that: 60% of EngineCalc's written reviews are positive against 0% of Hydraulic Calculator Engineer's, so the app with the better star average is not the one people write more warmly about.

EngineCalc ships an update every 2 months, Hydraulic Calculator Engineer every 22 months. The most recent releases landed on September 21, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | EngineCalc | Hydraulic Calculator Engineer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/enginecalc/id378824382/reviews) | **[4.3 (9 ratings)](https://appshunter.io/ios/app/hydraulic-calculator-engineer/id1664790770/reviews)** |
| Number of ratings | 3 | **9** |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 22 months |
| Monetization | Paid | **Free** |
| Size | 8 MB | 21 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [iTrinity, Inc.](https://appshunter.io/developer/547108075) | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) |

## What reviewers say

### EngineCalc

[App page](https://appshunter.io/ios/app/enginecalc/id378824382)

This utility app provides a collection of essential formulas and calculators for powersports and engine tuning. It allows users to perform complex calculations directly on their iPhone, eliminating the need for a laptop or desktop computer.

**Highlights:** Powersports formulas, Engine tuning calculators, Actual Volume Flow, Air Density, Compression Ratio, Cylinder Displacement, Volumetric Efficiency

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

**In-app purchases:** none


### Hydraulic Calculator Engineer

[App page](https://appshunter.io/ios/app/hydraulic-calculator-engineer/id1664790770)

This app offers a suite of hydraulic calculations for technicians and engineers. It simplifies complex hydraulics by automatically computing results based on user-entered values, eliminating the need for manual formula application.

**Highlights:** Cylinder Calculation, Power Calculation, Pressure Difference, Piston Diameter, Speed Calculation, Lifting Time, Volume Flow

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

**In-app purchases:** none


## Frequently asked questions

### Is EngineCalc free?

EngineCalc costs $0.99, with no in-app purchases.

### Is Hydraulic Calculator Engineer free?

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

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

Hydraulic Calculator Engineer is rated higher. EngineCalc averages 2.3 out of 5 from 3 ratings, while Hydraulic Calculator Engineer averages 4.3 from 9 ratings.

### Do EngineCalc or Hydraulic Calculator Engineer have ads?

Neither EngineCalc nor Hydraulic Calculator Engineer shows ads.

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

EngineCalc ships an update every 2 months, and Hydraulic Calculator Engineer every 22 months. Most recently, EngineCalc was updated on September 21, 2026 and Hydraulic Calculator Engineer on September 28, 2026.

---

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