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.
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.
- Phase equilibria calculations
- Thermodynamic property calculations
- Multiple calculation modes
- Intuitive interface
- Shareable reports and charts
- Support for various thermodynamic models
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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
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.
- Estimate gas volume
- Input operating conditions
- Select pipe size
- Quick field estimates
- Supports iPhone
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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.
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Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | DWSIM Calculator Free | Volume in Pipe |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 39 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Medeiros | Kelly Gayneaux |
Customer experience
DWSIM Calculator Free
Volume in Pipe
In-app purchases
DWSIM Calculator Free
No in-app purchases
Volume in Pipe
No in-app purchases
Questions
Is DWSIM Calculator Free free?
Is Volume in Pipe free?
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