Comparison

DWSIM Calculator Free vs Volume in Pipe

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

Head to head
About

DWSIM Calculator Free

This app calculates phase equilibria and mixture properties using advanced thermodynamic models. It offers various calculation modes for single compounds and phase behavior, with results viewable in text or charts. Reports and charts can be shared easily.

Highlights
  • Phase equilibria calculations
  • Thermodynamic property calculations
  • Multiple calculation modes
  • Intuitive interface
  • Shareable reports and charts
  • Support for various thermodynamic models
Features
Read full description

DWSIM Calculator is an app to calculate phase equilibria and properties of mixtures of substances (compounds) using advanced thermodynamic models. Based on the model library of DWSIM, an award-winning open-source process simulator for desktops, DWSIM Calculator for iOS features: - An intuitive interface for desktop process simulator users; - Free version includes data for Water, Ethanol, Methane, Ethane, Propane and Air only. Full version includes experimental data for more than 400 compounds; - 6 calculation modes: Single Compound Properties, VLE/VLLE Phase Equilibria, True Critical Point, Pressure-Temperature Phase Envelope, T-x-y and P-x-y Binary Envelopes; - Heater/Cooler Unit Operation; - 5 thermodynamic model sets: Peng-Robinson Equation of State, NRTL, UNIQUAC, Raoult's Law and IAPWS-IF97 Steam Tables; - 3 state specifications: Temperature/Pressure, Temperature/Vapor Fraction and Pressure/Vapor Fraction; - Phase properties: Enthalpy, Entropy, Compressibility Factor, Density, Molecular Weight, Heat Capacity, Thermal Conductivity and Viscosity; - Single Compound Properties: Critical Properties, 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. The calculation results can be viewed in text reports or charts. Reports can be shared as plain text (send as message, email, publish on facebook, etc) and charts can be shared as PDF or PNG files. The full version includes data for more than 400 compounds and more Unit Operation models. More information available at http://dwsim.inforside.com.br/wiki/index.php?title=Calculator

About

Volume in Pipe

Quickly estimate the gas volume within pipes, launchers, or vessels. Input operating conditions and pipe size for an approximate volume calculation. This tool is designed for rapid field estimates.

Highlights
  • Estimate gas volume
  • Input operating conditions
  • Select pipe size
  • Quick field estimates
  • Supports iPhone
Features
Read full description

Volume in Pipe (V.i.P.) is a simple, efficient tool for estimating the gas volume contained in a pipe, pig launcher/receiver, or vessel. Enter basic operating conditions, select a pipe size, and the app provides an approximate volume based on general assumptions. This tool is intended for quick field estimates only. It does not incorporate detailed gas analysis, which may significantly affect calculated volumes.

Screenshots

DWSIM Calculator Free4 screens
Volume in Pipe4 screens

Verdict

The call

The clearest difference is rating: Volume in Pipe at 5.0 against DWSIM Calculator Free's 4.5. DWSIM Calculator Free's advantage is update cadence (every 3 weeks vs every 26 months) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Volume in Pipe holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

DWSIM Calculator Free ships an update every 3 weeks, Volume in Pipe every 26 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 5 level
DWSIM Calculator Free versus Volume in Pipe: the parameters behind the verdict, then further details
ParameterDWSIM Calculator FreeVolume in Pipe
PriceFreeFree
Rating4.5 (2 ratings)5.0 (1 ratings) — better
Number of ratings2 — better1
Update frequencyEvery 3 weeks — betterEvery 26 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS8.0 — better16.6
Further details — not scored
Size39 MB11 MB
Age rating4+4+
DeveloperDaniel MedeirosKelly Gayneaux

Customer experience

DWSIM Calculator Free

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Volume in Pipe

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

DWSIM Calculator Free

No in-app purchases

None

Volume in Pipe

No in-app purchases

Questions

Is DWSIM Calculator Free free?
DWSIM Calculator Free is free to download, with no in-app purchases.
Is Volume in Pipe free?
Volume in Pipe is free to download, with no in-app purchases.
Which has better reviews, DWSIM Calculator Free or Volume in Pipe?
Volume in Pipe is rated higher. DWSIM Calculator Free averages 4.5 out of 5 from 2 ratings, while Volume in Pipe averages 5.0 from 1 ratings.
Do DWSIM Calculator Free or Volume in Pipe have ads?
Neither DWSIM Calculator Free nor Volume in Pipe shows ads.
Which is updated more often, DWSIM Calculator Free or Volume in Pipe?
DWSIM Calculator Free ships an update every 3 weeks, and Volume in Pipe every 26 months. Most recently, DWSIM Calculator Free was updated on November 2, 2026 and Volume in Pipe on November 3, 2026.

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