# DWSIM Calculator Free vs Volume in Pipe

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.

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.

## The numbers

| Metric | DWSIM Calculator Free | Volume in Pipe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/dwsim-calculator-free/id1091004601/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/volume-in-pipe/id1582068096/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 26 months |
| Monetization | Free | Free |
| Size | 39 MB | 11 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Medeiros](https://appshunter.io/developer/1091004600) | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) |

## What reviewers say

### DWSIM Calculator Free

[App page](https://appshunter.io/ios/app/dwsim-calculator-free/id1091004601)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Volume in Pipe

[App page](https://appshunter.io/ios/app/volume-in-pipe/id1582068096)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*