Comparison

Natural Gas Pipe Size vs Two Phase Separator Lite

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

Head to head
About

Natural Gas Pipe Size

Quickly calculate natural gas pipe diameters and pressure drops for installations. Supports a wide range of conditions, materials, and units, providing instant and accurate results without subscriptions or ads.

Highlights
  • Instant pipe diameter calculation
  • Pressure drop estimation
  • Supports various conditions (heat, pressure, temp)
  • Metric and imperial units
  • Material and fitting selection
  • No internet connection required
Features
Read full description

Why not just use an AI assistant to quickly size pipes for natural gas installations? If you prefer fast and consistent results with a familiar user interface, no second-guessing, no trying out different AI models and no subscriptions - this app is for you. #### Pipe sizing and pressure drop calculation for natural gas installations made easy Estimate required pipe diameter for natural gas piping / installations in an instant. Calculate pressure drop for the selected pipe section. #### Obtain required pipe diameter instantly The application provides a quick and simple way to obtain required pipe diameter when designing natural gas piping systems. Only some basic user input is required (heat output and pipe length) and the result is instantaneous and accurate. #### Wide range of conditions The application allows to perform calculations at a wide range of conditions, as gas lower heating value, temperature, pressure and location altitude can be set individually in order to get accurate results. #### Calculate pressure drop easily After a quick estimate of the recommended standard or nominal pipe size, the user can choose their own diameter, customize pipe material and define fittings and valves to calculate volume flow rate, velocity and pressure drop. The app will notify the user if their chosen diameter is too small. #### Metric and Imperial units Natural Gas Pipe Size app can perform calculations using metric or imperial units. #### Features - Provides required pipe diameter for a pipe section in an instant; - Recommended diameter is displayed as a standard DN or nominal NPS; - Gas working pressure and temperature can be specified; - Wide range of working conditions (heat output, pressure and temperature); - Suitable for individual (home) as well as larger, industrial applications; - Different predefined materials can be selected; - Fittings and valves can be selected from the list; - Displays natural gas volume flow rate and pressure drop for selected pipe section; - Suggests whether the selected pipe diameter might be too small; - Metric and imperial units; - No data connection required to perform calculations; - No ads, no in-app purchases; #### Note The application displays results for a pipe section. Calculations for multiple pipe sections should be performed separately. ------ #### Some reviews Natural Gas Pipe Size: pipe sizing & pressure drop calculation for natural gas installations Very helpful natural gas pipe sizing.... I really like this version for sizing natural gas lines. Imperial units are certainly appreciated. Just be sure to reset the fittings section for each section of pipe you checking. 5 stars by Cod Peace | 09 Feb 2016 ---------- Erdgasleitung: Rohr Dimensionierung und Druckverlust-Berechnung für Erdgasanlagen Erdgasleitung Ich benutze diese App sehr viel und immer mit Erfolg. Habe die Angaben oft nachgerechnet und sie stimmten immer. 5 stars by MOMOG62 | 10 Dec 2013

About

Two Phase Separator Lite

Features
Read full description

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

Natural Gas Pipe Size4 screens
Two Phase Separator Lite4 screens

Verdict

The call

The clearest difference is price: Two Phase Separator Lite at Free against Natural Gas Pipe Size's $6.99. Two Phase Separator Lite also leads on iOS requirement (11.0 vs 26.0). Natural Gas Pipe Size's advantage is update cadence (every 9 months vs every 35 months). On ads, in-app purchases 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

Two Phase Separator Lite is free to download; Natural Gas Pipe Size costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Natural Gas Pipe Size ships an update every 9 months, Two Phase Separator Lite every 35 months. The most recent releases landed on October 31, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
Natural Gas Pipe Size versus Two Phase Separator Lite: the parameters behind the verdict, then further details
ParameterNatural Gas Pipe SizeTwo Phase Separator Lite
Price$6.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 9 months — betterEvery 35 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.011.0 — better
Further details — not scored
Size1 MB27 MB
Age rating4+4+
DeveloperSebastjan ValicAli Pourahmadi Laleh

In-app purchases

None

Natural Gas Pipe Size

No in-app purchases

None

Two Phase Separator Lite

No in-app purchases

Questions

Is Natural Gas Pipe Size free?
Natural Gas Pipe Size costs $6.99, with no in-app purchases.
Is Two Phase Separator Lite free?
Two Phase Separator Lite is free to download, with no in-app purchases.
Do Natural Gas Pipe Size or Two Phase Separator Lite have ads?
Neither Natural Gas Pipe Size nor Two Phase Separator Lite shows ads.
Which is updated more often, Natural Gas Pipe Size or Two Phase Separator Lite?
Natural Gas Pipe Size ships an update every 9 months, and Two Phase Separator Lite every 35 months. Most recently, Natural Gas Pipe Size was updated on October 31, 2026 and Two Phase Separator Lite on October 26, 2026.

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