# Gas Converter vs DWSIM Simulator

The clearest difference is in-app purchases: Gas Converter at none against DWSIM Simulator's 10. Gas Converter also leads on iOS requirement (9.0 vs 12.0). DWSIM Simulator's advantage is update cadence (every 6 weeks vs every 10 months). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.7 for Gas Converter against 4.7 for DWSIM Simulator. Both are backed by a comparable volume of ratings — 201 and 107 respectively. Written reviews are what separate them: 50% of Gas Converter's written reviews are positive against 57% of DWSIM Simulator's.

Gas Converter ships an update every 10 months, DWSIM Simulator every 6 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Gas Converter | DWSIM Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (201 ratings)](https://appshunter.io/ios/app/gas-converter/id681227665/reviews)** | [4.7 (107 ratings)](https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews) |
| Number of ratings | **201** | 107 |
| Positive reviews | 50.0% of reviews | **57.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 68 MB | 106 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Linde GmbH](https://appshunter.io/developer/657403417) | [Daniel Medeiros](https://appshunter.io/developer/1091004600) |

## What reviewers say

### Gas Converter

[App page](https://appshunter.io/ios/app/gas-converter/id681227665)

Easily convert volumetric to weight-based units for 15 industrial gases. Get additional information like enthalpy and boiling points. Simple three-step process for quick calculations.

**Highlights:** Convert volumetric to weight units, Supports 15 industrial gases, Provides enthalpy and boiling point data, Calculates values at different temperatures, Simple three-step conversion process, Sleek and usable design

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

**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 Gas Converter free?

Gas Converter 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, Gas Converter or DWSIM Simulator?

Gas Converter is rated higher. Gas Converter averages 4.7 out of 5 from 201 ratings, while DWSIM Simulator averages 4.7 from 107 ratings.

### Do Gas Converter or DWSIM Simulator have ads?

Neither Gas Converter nor DWSIM Simulator shows ads.

### Which is updated more often, Gas Converter or DWSIM Simulator?

Gas Converter ships an update every 10 months, and DWSIM Simulator every 6 weeks. Most recently, Gas Converter was updated on October 23, 2026 and DWSIM Simulator on October 24, 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.*