# DWSIM Simulator — Chemical Process Simulation

> Offline chemical process simulator for building and analyzing process flowsheets. (iPhone/iPad app by Daniel Medeiros.)

- Source: https://appshunter.io/ios/app/dwsim-simulator/id1162110266 (this page in markdown: same URL + `.md`)
- Developer: [Daniel Medeiros](https://appshunter.io/developer/1091004600)
- Category: Productivity, Education
- Price: Free with in-app purchases
- Rating: 4.60/5 from 105 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 106 MB
- Released: 2016-10-08
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews.md

## What is DWSIM Simulator?

DWSIM Simulator is a Steady-State Chemical Process Simulator, featuring:

- Offline functionality: no need to connect to online databases or servers, DWSIM runs completely offline on your device, wherever you are!

- Touch-enabled Process Flowsheet Diagram (PFD) Drawing Interface: A hardware-accelerated PFD interface with touch support allows Chemical Engineers to build complex process models in a few minutes

- VLE/VLLE/SVLE/SVLLE calculations using Equation of State and Activity Coefficient models: calculate fluid properties and phase distribution with advanced thermodynamic models

- Compound database with extensive data for more than 1500 compounds

- Rigorous Thermodynamic Models*: PC-SAFT EOS, GERG-2008 EOS, Peng-Robinson EOS, Soave-Redlich-Kwong EOS, Lee-Kesler-Plöcker, Chao-Seader, Modified UNIFAC (Dortmund), UNIQUAC, NRTL, Wilson, Raoult's Law and IAPWS-IF97 Steam Tables

- Thermophysical state (phase) properties: Enthalpy, Entropy, Internal Energy, Gibbs and Helmholtz Free Energies, Compressibility Factor, Isothermal Compressibility, Bulk Modulus, Speed of Sound, Joule-Thomson Expansion Coefficient, Density, Molecular Weight, Heat Capacity, Thermal Conductivity and Viscosity

- Single-compound properties: Critical Parameters, Acentric Factor, Chemical formula, Structure formula, CAS Registry Number, Boiling Point Temperature, Vapor Pressure, Heat of Vaporization, Ideal gas Enthalpy, Ideal gas Enthalpy of Formation at 25 C, Ideal Gas Gibbs Free Energy of Formation at 25 C, Ideal Gas Entropy, Heat Capacity Cp, Ideal Gas Heat Capacity, Liquid Heat Capacity, Solid Heat Capacity, Heat Capacity Cv, Liquid Viscosity, Vapor Viscosity, Liquid Thermal Conductivity, Vapor Thermal Conductivity, Solid Density, Liquid Density and Molecular Weight

- Comprehensive Unit Operation Model set*, including Mixer, Splitter, Separator, Pump, Compressor, Expander, Heater, Cooler, Valve, Shortcut Column, Heat Exchanger, Component Separator, Pipe Segment, Rigorous Distillation and Absorption Columns, Wind Turbine, Hydroelectric Turbine, Water Electrolyzer and Solar Panel

- Support for Chemical Reactions and Reactors*: DWSIM features support for Conversion, Equilibrium and Kinetic reactions, together with their respective Reactor models

- Flowsheet Parametric Studies: Use the Sensitivity Analysis Tool to run automated parametric studies on your process model; The Flowsheet Optimizer tool can bring the simulation to an optimum state according to user-defined criteria; The Calculator tool can read flowsheet variables, perform math operations on them and write the results back to the flowsheet

- Petroleum Characterization: Bulk C7+ and TBP Distillation Curve characterization tools enable creation of pseudocompounds to simulate petroleum processing facilities

- Parallel multicore CPU calculation engine: a fast and reliable flowsheet solver that takes advantage of the multicore CPUs on modern mobile devices

- Save/Load XML simulation files on the device or in the cloud

- Export simulation results to PDF and Text documents

* Some items are available through in-app purchases

ABOUT CHEMICAL PROCESS SIMULATION

Chemical Process Simulation is a model-based representation of chemical, physical, biological, and other technical processes and unit operations in software. Basic prerequisites are a thorough knowledge of chemical and physical properties of pure components and mixtures, of reactions, and of mathematical models which, in combination, allow the calculation of a process in a computing device.

Process simulation software describes processes in flow diagrams where unit operations are positioned and connected by product or educt streams. The software has to solve the mass and energy balance to find a stable operating point. The goal of a process simulation is to find optimal conditions for a process.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/dwsim-simulator/id1162110266/reviews.md

### 5/5 — DWSIM

*2024-12-21*

I m not able to change background color to white when installed on iPad Pro. Please update software

### 3/5 — It’s ok I guess I mean it is weird on mobile

*2024-02-06*

It’s very finicky compared too computer

### 4/5 — Reclamação

*2023-08-10, version 4.2.0*

Necessário adição de novos equipamentos

### 5/5 — Not real

*2023-06-04*

So I purchased full package of this app thinking it’s real, it’s not, I am getting result as endothermic reaction when in reality it’s actually an endothermic reaction. I have done multiple tests for known reactions and all are giving absolutely wrong answers

**Developer response:** The app is real and prone to bugs. You could have asked for support and I would have promptly helped you. Anyway, you can ask for a refund from Apple if you're not satisfied.

### 1/5 — Useless

*2022-09-26*

Don’t install useless

**Developer response:** This app is not for everyone. Sorry

### 3/5 — Amazing!!

*2018-11-01*

I was surprised that such a process simulation can be done in iPad. I can’t make clear what I can do simulate in detail yet, however, it is the fact this application is amazing.

**Developer response:** Thank you very much, don't hesitate on getting in touch if you have any questions.

### 5/5 — Avaliação

*2016-10-21, version 1.1.1*

Excelente ferramenta

## Frequently asked questions about DWSIM Simulator

### What kind of calculations can DWSIM Simulator perform?

DWSIM Simulator can perform VLE/VLLE/SVLE/SVLLE calculations using various Equation of State and Activity Coefficient models. It also calculates thermophysical state properties and single-compound properties.

### Does DWSIM Simulator require an internet connection to work?

No, DWSIM Simulator functions completely offline. You do not need to connect to online databases or servers to build or run your process models.

### What are the supported devices for DWSIM Simulator?

DWSIM Simulator is supported on iPhone, iPad, and iPod devices. It is designed to run on iOS platforms.

### How often is DWSIM Simulator updated?

The latest version of DWSIM Simulator is 5.0.0, last updated on March 21, 2024. Updates are released periodically to improve functionality and add features.

### What is the user rating for DWSIM Simulator?

DWSIM Simulator has a high user rating of 4.6 stars based on 101 ratings, indicating positive user sentiment and satisfaction with its performance.

### Can DWSIM Simulator handle complex process models?

Yes, DWSIM Simulator is designed for complex process models. It features a touch-enabled PFD drawing interface and a parallel multicore CPU calculation engine for efficient solving.

### Does DWSIM Simulator offer any advanced analysis tools?

Yes, DWSIM Simulator includes a Sensitivity Analysis Tool for automated parametric studies, a Flowsheet Optimizer to find optimal simulation states, and a Calculator tool for custom operations.

### What age rating does DWSIM Simulator have?

DWSIM Simulator has an age rating of 4+, making it suitable for a wide range of users, including students and young engineers.

## Version history (last 5 releases)

### 5.0.0 — 2024-03-21

- [FREE] New Wilson Property Package
- [FREE] New Water Electrolyzer Unit Operation
- [FREE] New Hydroelectric Turbine Unit Operation
- [FREE] New Wind Turbine Unit Operation
- [FREE] New Solar Panel Unit Operation
- Updated phase equilibria calculation subsystem to match DWSIM for Desktop
- Updated Rigorous Column model to match DWSIM for Desktop
- Added Modern and Black-and-White Flowsheet Themes
- Bug fixes and minor enhancements

### 4.2.0 — 2023-05-12

- PFR: User-Defined Pressure Drop
- PFR: Define the Number of Tubes
- Enhanced stability of PT Flash
- Fixed PFR Pressure Drop calculation
- Fixed a bug in Conversion Reactor

### 4.1.0 — 2022-03-08

- New 'Auto-Connect Added Objects' feature
- Fixed an issue with Conversion Reactor

### 4.0.0 — 2022-01-29

- New Flat Color Flowsheet Theme
- Overall reliability enhancements to Equilibrium Flash Calculations
- Fixed Adiabatic Calculation mode in Gibbs and Equilibrium Reactors
- Fixed Conversion Reactor
- Enhanced Distillation Column Solver, now supports all specification types
- Other bug fixes and enhancements

### 3.3.11 — 2021-01-19

Fixed a bug with Material Stream cloning

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## More apps by Daniel Medeiros

- [DWSIM Calculator Free](https://appshunter.io/ios/app/dwsim-calculator-free/id1091004601)
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- [Plot Digitizer](https://appshunter.io/ios/app/plot-digitizer/id1497211648)

All apps by Daniel Medeiros: https://appshunter.io/developer/1091004600

## Related topics

[dwsim simulator](https://appshunter.io/ios/topics/dwsim-simulator) · [dwsim](https://appshunter.io/ios/topics/dwsim)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*