# Converter vs Hydraulic Calculator Engineer

The clearest difference is review sentiment: Converter at 96% against Hydraulic Calculator Engineer's 0%. Converter also leads on rating (4.9 vs 4.3) and update cadence (every 2 months vs every 22 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Converter holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Converter has 897 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 96% of Converter's written reviews are positive against 0% of Hydraulic Calculator Engineer's.

Converter ships an update every 2 months, Hydraulic Calculator Engineer every 22 months. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Converter | Hydraulic Calculator Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (897 ratings)](https://appshunter.io/ios/app/converter-universal-conversion/id423521445/reviews)** | [4.3 (9 ratings)](https://appshunter.io/ios/app/hydraulic-calculator-engineer/id1664790770/reviews) |
| Number of ratings | **897** | 9 |
| Positive reviews | **96.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 22 months |
| Monetization | Free | Free |
| Size | 37 MB | 21 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) |

## What reviewers say

### Converter

[App page](https://appshunter.io/ios/app/converter-universal-conversion/id423521445)

This app offers a comprehensive unit and hardness conversion tool with an easy-to-use interface. It includes currency conversion with updated exchange rates, over 300 engineering and scientific units, and a specialized hardness converter. Additional features like timezone conversion, pace calculation, and a standard calculator enhance its utility.

**Highlights:** Currency converter with live exchange rates, Over 300 engineering and scientific units, Specialized hardness converter, Timezone conversion, Running pace calculator, Integrated standard calculator, Conversion history log

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate and fast conversions
- 💡 Comprehensive coverage of units and categories
- 🔒 No ads or hidden fees
- 💡 Useful currency converter

**What reviewers complain about**

- 🐛 Currency conversion rates can be outdated
- 🔍 Difficult to find specific conversions due to large number of options
- 💡 Lack of ability to set favorite conversions as default

**Reported bugs**

- Occasional crashes on startup for non-English/German users
- Conversion from meters to feet does not show inches

**Requested features**

- Add fuel efficiency conversions
- Allow users to set favorite conversions as default
- Improve currency conversion rate updates


### 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 Converter free?

Converter is free to download, 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, Converter or Hydraulic Calculator Engineer?

Converter is rated higher. Converter averages 4.9 out of 5 from 897 ratings, while Hydraulic Calculator Engineer averages 4.3 from 9 ratings.

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

Neither Converter nor Hydraulic Calculator Engineer shows ads.

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

Converter ships an update every 2 months, and Hydraulic Calculator Engineer every 22 months. Most recently, Converter was updated on September 21, 2026 and Hydraulic Calculator Engineer on September 10, 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.*