# DWSIM Simulator vs ProEngineer Calculator

The clearest difference is price: DWSIM Simulator at Free against ProEngineer Calculator's $19.99. DWSIM Simulator also leads on ratings volume (105 vs 1) and iOS requirement (12.0 vs 15.1). ProEngineer Calculator's advantage is review sentiment (100% vs 57%) and in-app purchases (none vs 10). On update cadence, ads and device support there is nothing between them.

DWSIM Simulator is free to download; ProEngineer Calculator costs $19.99 up front. DWSIM Simulator sells 10 one-off in-app purchases. ProEngineer Calculator asks for nothing beyond the download.

ProEngineer Calculator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: DWSIM Simulator has 105 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of DWSIM Simulator's written reviews are positive against 100% of ProEngineer Calculator's.

DWSIM Simulator ships an update every 6 weeks, ProEngineer Calculator monthly. The most recent releases landed on September 13, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | DWSIM Simulator | ProEngineer Calculator |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [4.6 (105 ratings)](https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/proengineer-calculator/id6752825468/reviews)** |
| Number of ratings | **105** | 1 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 106 MB | 46 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Medeiros](https://appshunter.io/developer/1091004600) | [Margaret Hayes](https://appshunter.io/developer/1840974547) |

## What reviewers say

### 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 |


### ProEngineer Calculator

[App page](https://appshunter.io/ios/app/proengineer-calculator/id6752825468)

This app provides engineers and students with a comprehensive suite of tools for complex calculations across various engineering disciplines. It offers features for stoichiometry, thermodynamics, electrical, and fluid mechanics, along with process visualization and project management aids.

**Highlights:** Stoichiometry & Material Balances, Thermodynamics Calculations, Electrical Calculations, Flow Mechanics Calculator, Process Timeline, Consultant Directory

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

**In-app purchases:** none


## Frequently asked questions

### Is DWSIM Simulator free?

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

### Is ProEngineer Calculator free?

ProEngineer Calculator costs $19.99, with no in-app purchases.

### Which has better reviews, DWSIM Simulator or ProEngineer Calculator?

ProEngineer Calculator is rated higher. DWSIM Simulator averages 4.6 out of 5 from 105 ratings, while ProEngineer Calculator averages 5.0 from 1 ratings.

### Do DWSIM Simulator or ProEngineer Calculator have ads?

Neither DWSIM Simulator nor ProEngineer Calculator shows ads.

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

DWSIM Simulator ships an update every 6 weeks, and ProEngineer Calculator monthly. Most recently, DWSIM Simulator was updated on September 13, 2026 and ProEngineer Calculator on August 14, 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.*