# DWSIM Simulator vs ChemE Calculator

The clearest difference is review sentiment: ChemE Calculator at 100% against DWSIM Simulator's 57%. ChemE Calculator also leads on in-app purchases (none vs 10) and update cadence (weekly vs every 6 weeks). DWSIM Simulator's advantage is ratings volume (105 vs 9). 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. ChemE Calculator asks for nothing beyond the download.

ChemE Calculator holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: DWSIM Simulator has 105 ratings behind it against 9, 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 ChemE Calculator's.

DWSIM Simulator ships an update every 6 weeks, ChemE Calculator weekly. Both last shipped on September 13, 2026.

## The numbers

| Metric | DWSIM Simulator | ChemE Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (105 ratings)](https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/cheme-calculator/id1329240890/reviews)** |
| Number of ratings | **105** | 9 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | Free |
| Size | 106 MB | 15 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Medeiros](https://appshunter.io/developer/1091004600) | [Bryan Tiedemann](https://appshunter.io/developer/1315321665) |

## 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 |


### ChemE Calculator

[App page](https://appshunter.io/ios/app/cheme-calculator/id1329240890)

This app provides chemical engineering calculations like VLE and steam tables, along with unit conversions and a chemical database. It allows for quick problem-solving on mobile devices, with results exportable via email. Includes kitten pictures for breaks.

**Highlights:** VLE calculations (Flash, Bubble P/T, Dew P/T), Generalized and specific steam table calculations, Unit conversion tool, Chemical database search (PubChem), Email results export, Support for multicomponent mixtures with Peng-Robinson EOS

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DWSIM Simulator free?

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

### Is ChemE Calculator free?

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

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

ChemE Calculator is rated higher. DWSIM Simulator averages 4.6 out of 5 from 105 ratings, while ChemE Calculator averages 4.9 from 9 ratings.

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

Neither DWSIM Simulator nor ChemE Calculator shows ads.

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

DWSIM Simulator ships an update every 6 weeks, and ChemE Calculator weekly. Most recently, DWSIM Simulator was updated on September 13, 2026 and ChemE Calculator 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.*