Comparison

Gas Converter vs DWSIM Simulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gas Converter

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
Read full description

Linde Gas Converter offers you an easy solution to convert volumetric to weight based units for 15 industrial gases* in total. Combining a maximum of usability with a sleek design the Linde Gas Converter app allows the user to convert very easily between liquid and gaseous units. In addition, the customer gets further information like enthalpy, boiling point or values of different temperatures (0°C, 15°C, 20°C). Only three steps are necessary! By starting the app, simply choose the gas you want to convert, then select the calculation units, enter a value and the result is immediately displayed. No redundant clicks or confirmations are necessary. The Linde Gas Converter is the appropriate tool for everybody who works with gases and is looking for a simple and convenient solution. *Following gases are integrated: •Oxygen •Nitrogen •Argon •Helium •Carbon Monoxide •Carbon Dioxide •Hydrogen •Methane •Acetylene •Propane •Butane (new) •Ethylene (new) •Ammonia (new) •Chlorine (new) •Methanol (new)

About

DWSIM Simulator

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
Read full description

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.

Screenshots

Gas Converter4 screens
DWSIM Simulator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Gas Converter against 4.6 for DWSIM Simulator. Both are backed by a comparable volume of ratings — 197 and 105 respectively. Written reviews are what separate them: 50% of Gas Converter's written reviews are positive against 57% of DWSIM Simulator's.

UpkeepUpdate frequency

Gas Converter ships an update every 10 months, DWSIM Simulator every 6 weeks. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 7 level
Gas Converter versus DWSIM Simulator: the parameters behind the verdict, then further details
ParameterGas ConverterDWSIM Simulator
PriceFreeFree
Rating4.7 (197 ratings) — better4.6 (105 ratings)
Positive reviews50.0% of reviews57.1% of reviews — better
Number of ratings197 — better105
Update frequencyEvery 10 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size68 MB106 MB
Age rating4+4+
DeveloperLinde GmbHDaniel Medeiros

Customer experience

Gas Converter

All ratings197 ratings
Positive92.4%
Neutral1.5%
Negative6.1%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

DWSIM Simulator

All ratings105 ratings
Positive91.4%
Neutral3.8%
Negative4.8%
Written reviews7 reviews
Positive57.1%
Neutral28.6%
Negative14.3%

In-app purchases

None

Gas Converter

No in-app purchases

10 purchases

DWSIM Simulator

One-time10
  • User-Defined Unit Set$1.99
  • Flowsheet Utilities Pack$2.99
  • Unit Operations Pack 1$2.99
Show 7 more
  • Unit Operations Pack 2$2.99
  • Unit Operations Pack 3$2.99
  • Activity Coeff. Model Pack$3.99
  • Equation of State Model Pack$3.99
  • Reactor Models Pack$4.99
  • Unlock All Features$9.99
  • Unlock All Features$39.99

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 197 ratings, while DWSIM Simulator averages 4.6 from 105 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 September 23, 2026 and DWSIM Simulator on September 13, 2026.

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