Gas Volume Calc vs Two Phase Separator Lite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gas Volume Calc
This utility estimates natural gas flow rate using standard orifice meter calculations. It's designed for field use by operators, technicians, and engineers, combining meter geometry, flowing conditions, and gas composition for quick, reliable estimates.
- Estimates natural gas flow rate (MCFD)
- Uses standard orifice meter calculations
- Combines meter geometry, flowing conditions, and gas composition
- Provides reliable flow estimates in seconds
- Simple and dependable field workflow
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Orifice Calc is a field-ready utility for estimating natural gas flow rate (MCFD) using standard orifice meter calculations. Designed for operators, technicians, and engineers, the app combines meter geometry, flowing conditions, and gas composition inputs to produce reliable flow estimates in seconds. Whether you are troubleshooting production, verifying measurements, or performing quick field calculations, Orifice Calc provides a simple and dependable workflow.
Two Phase Separator Lite
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This is the lite version of the equipment sizing app which provides the two-phase separator design for various process conditions. The results for two different approaches, i.e. York Demister and Theoretical, are presented for demonstration of the full version app. Please refer to my website at http://salvasolution.com for background information and technical support. Ali P. Laleh, PhD, P.Eng.
Screenshots
Verdict
The clearest difference is iOS requirement: Two Phase Separator Lite at 11.0 against Gas Volume Calc's 26.1. On price, update cadence, 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.
Gas Volume Calc ships an update every 61 months, Two Phase Separator Lite every 35 months. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.
| Parameter | Gas Volume Calc | Two Phase Separator Lite |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 61 months | Every 35 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Kelly Gayneaux | Ali Pourahmadi Laleh |
In-app purchases
Gas Volume Calc
No in-app purchases
Two Phase Separator Lite
No in-app purchases
Questions
Is Gas Volume Calc free?
Is Two Phase Separator Lite free?
Do Gas Volume Calc or Two Phase Separator Lite have ads?
Which is updated more often, Gas Volume Calc or Two Phase Separator Lite?
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