Comparison

Hydraulic System Calculator 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

Hydraulic System Calculator

Calculate key parameters for hydraulic cylinders, pumps, motors, and pipes. Design individual components, view formulas, and switch between metric and imperial units for precise engineering.

Highlights
  • Calculate cylinder, pump, and motor parameters
  • Design single/double-acting cylinders
  • View and switch units (Metric/Imperial)
  • Calculate piping parameters
  • Dynamic result updates
  • Copy and share results
Features
Read full description

The Hydraulic System Calculator is an intuitive tool for people working with hydraulic cylinders, pumps, motors and pipes. This app enables design of individual hydraulic components around single-acting or double-acting cylinders. A user can look into the formulas involved and switch to their preferred units. Features at a glance: - By entering the requisite dimensions of the cylinder and parameters like the pressure and oil flow the user would be able to calculate the areas & volumes in the cylinder, extraction & retraction forces, velocity, time, outflow and ratio. The output is derived on both the piston and rod side of the cylinder - A backward compatibility is also provided on some of the parameters (force, time & velocity) in the cylinder area to provide users with the extension of using the calculator in more user friendly environment - The app enables the calculation of flow rate, pressure, displacement, speed, torque and power in Motor section - The app enables the calculation of displacement, flow rate, electric motor power and total efficiency in Pump section - The app can be used to calculate pressure drop around an orifice - Piping parameters like velocity, cross-sectional area and reynolds number can be calculated using absolute or kinematic viscosity - The calculations can be carried out in both Metric or Imperial units - The data provided is in conformation with ISO 3320, ISO 3321 and ISO 4393 in the cylinder section - The calculator is built to dynamically update the results as the user keys in the values - The input and output values could be displayed in preferred sub-units as per the requirements of the user after the calculation is carried out. It also helps the user to make specific changes in units before the calculations - Interactive images on cylinder section provides the user with a good understanding of the component - The results can be copied to clipboard and can be shared via e-mail

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

Hydraulic System Calculator4 screens
DWSIM Simulator4 screens

Verdict

The call

The clearest difference is review sentiment: DWSIM Simulator at 57% against Hydraulic System Calculator's 0%. DWSIM Simulator also leads on rating (4.6 vs 4.0) and update cadence (every 6 weeks vs every 7 months). Hydraulic System Calculator's advantage is in-app purchases (none vs 10). On price, ads, monetization model and device support 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. Hydraulic System Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DWSIM Simulator holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: DWSIM Simulator has 105 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Hydraulic System Calculator's written reviews are positive against 57% of DWSIM Simulator's.

UpkeepUpdate frequency

Hydraulic System Calculator ships an update every 7 months, DWSIM Simulator every 6 weeks. The most recent releases landed on September 24, 2026 and September 13, 2026 respectively.

Scorecard6 real differences · 4 level
Hydraulic System Calculator versus DWSIM Simulator: the parameters behind the verdict, then further details
ParameterHydraulic System CalculatorDWSIM Simulator
PriceFreeFree
Rating4.0 (3 ratings)4.6 (105 ratings) — better
Positive reviews0.0% of reviews57.1% of reviews — better
Number of ratings3105 — better
Update frequencyEvery 7 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size94 MB106 MB
Age rating4+4+
DeveloperTrelleborg Sealing SolutionsDaniel Medeiros

Customer experience

Hydraulic System Calculator

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

DWSIM Simulator

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

In-app purchases

None

Hydraulic System Calculator

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 Hydraulic System Calculator free?
Hydraulic System Calculator 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, Hydraulic System Calculator or DWSIM Simulator?
DWSIM Simulator is rated higher. Hydraulic System Calculator averages 4.0 out of 5 from 3 ratings, while DWSIM Simulator averages 4.6 from 105 ratings.
Do Hydraulic System Calculator or DWSIM Simulator have ads?
Neither Hydraulic System Calculator nor DWSIM Simulator shows ads.
Which is updated more often, Hydraulic System Calculator or DWSIM Simulator?
Hydraulic System Calculator ships an update every 7 months, and DWSIM Simulator every 6 weeks. Most recently, Hydraulic System Calculator was updated on September 24, 2026 and DWSIM Simulator on September 13, 2026.

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