# Hydraulic System Calculator vs DWSIM Simulator

The clearest difference is review sentiment: DWSIM Simulator at 57% against Hydraulic System Calculator's 0%. DWSIM Simulator also leads on rating (4.6 vs 4.0) and update cadence (every 6 weeks vs every 7 months). Hydraulic System Calculator's advantage is in-app purchases (none vs 10). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. DWSIM Simulator sells 10 one-off in-app purchases. Hydraulic System Calculator asks for nothing beyond the download.

DWSIM Simulator holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: DWSIM Simulator has 105 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Hydraulic System Calculator's written reviews are positive against 57% of DWSIM Simulator's.

Hydraulic System Calculator ships an update every 7 months, DWSIM Simulator every 6 weeks. The most recent releases landed on September 24, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Hydraulic System Calculator | DWSIM Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445/reviews) | **[4.6 (105 ratings)](https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews)** |
| Number of ratings | 3 | **105** |
| Positive reviews | 0.0% of reviews | **57.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 94 MB | 106 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Daniel Medeiros](https://appshunter.io/developer/1091004600) |

## What reviewers say

### 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


### DWSIM Simulator

[App page](https://appshunter.io/ios/app/dwsim-simulator/id1162110266)

This app provides a powerful offline chemical process simulation tool. It allows engineers to build complex process models, perform thermodynamic calculations, and analyze various unit operations. Features include a touch-enabled PFD interface, extensive compound databases, and advanced calculation engines.

**Highlights:** Offline chemical process simulation, Touch-enabled PFD drawing interface, Extensive thermodynamic models, Compound database for 1500+ compounds, Unit operation models, Chemical reaction and reactor support, Flowsheet parametric studies

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| User-Defined Unit Set | $1.99 | one-time |
| Flowsheet Utilities Pack | $2.99 | one-time |
| Unit Operations Pack 1 | $2.99 | one-time |
| Unit Operations Pack 2 | $2.99 | one-time |
| Unit Operations Pack 3 | $2.99 | one-time |
| Activity Coeff. Model Pack | $3.99 | one-time |
| Equation of State Model Pack | $3.99 | one-time |
| Reactor Models Pack | $4.99 | one-time |
| Unlock All Features | $9.99 | one-time |
| Unlock All Features | $39.99 | one-time |


## Frequently asked questions

### Is Hydraulic System Calculator free?

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

### Is DWSIM Simulator free?

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

### Which has better reviews, Hydraulic System Calculator or DWSIM Simulator?

DWSIM Simulator is rated higher. Hydraulic System Calculator averages 4.0 out of 5 from 3 ratings, while DWSIM Simulator averages 4.6 from 105 ratings.

### Do Hydraulic System Calculator or DWSIM Simulator have ads?

Neither Hydraulic System Calculator nor DWSIM Simulator shows ads.

### Which is updated more often, Hydraulic System Calculator or DWSIM Simulator?

Hydraulic System Calculator ships an update every 7 months, and DWSIM Simulator every 6 weeks. Most recently, Hydraulic System Calculator was updated on September 24, 2026 and DWSIM Simulator on September 13, 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.*