# Compressible Gas Flow Calc > Calculates compressible gas flow pressure drops and flow rates in pipes. (iPhone/iPad app by Niagara Mobile LLC.) - Source: https://appshunter.io/ios/app/compressible-gas-flow-calc/id900600984 (this page in markdown: same URL + `.md`) - Developer: [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) - Category: Business, Education - Price: $3.99 - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.6 · 1 MB - Languages: American English - Released: 2014-07-25 - Data updated: 2026-06-25 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/compressible-gas-flow-calc/id900600984/reviews.md ## What is Compressible Gas Flow Calc? This app does one thing, but it does it well. It will calculate the pressure drops and flow rates for compressible gas flow in a pipe. This app is different from other pressure drop apps in that it does not restrict the results to a certain pressure drop, which treat it as a liquid. There are 3 calculation modes that can be used: -Calculate inlet pressure: This is useful when the user knows they need to deliver a certain amount of a gas against a certain back pressure. Such as filling a tank or vessel. -Calculate outlet pressure: This will determine the residual pressure in the gas at the end of a pipe run. -Calculate flow rate: Not much to be said here, enter the pressures and you get the flow rate. We have used this to calculate free flow of high pressure lines, for example if there is a break in a line (outlet pressure is zero). App includes a full database of standard pipe sizes or you can enter your own size using the Custom selection. There are over 20 gases in the database with viscosity as a function of temperature using Lennard-Jones formulation. Results are based on a modified Newton-Raphson iterative method and have been benchmarked against CFD results. Choose between Imperial or SI units. ## Key features - Calculate inlet pressure - Calculate outlet pressure - Calculate flow rate - Standard and custom pipe sizes - Database of 20+ gases - Imperial or SI units ## Frequently asked questions about Compressible Gas Flow Calc ### What is Compressible Gas Flow Calc used for? Compressible Gas Flow Calc is used to calculate pressure drops and flow rates for compressible gas flow within pipes. It offers three distinct calculation modes to suit various engineering needs. ### What calculation modes does Compressible Gas Flow Calc offer? Compressible Gas Flow Calc offers three modes: calculating inlet pressure, calculating outlet pressure, and calculating flow rate. These modes help users determine specific parameters based on known variables. ### Does Compressible Gas Flow Calc support custom pipe sizes? Yes, Compressible Gas Flow Calc allows users to enter their own pipe sizes using the Custom selection option, in addition to a database of standard pipe sizes. ### How many gases are included in Compressible Gas Flow Calc? Compressible Gas Flow Calc includes a database of over 20 gases. The app uses Lennard-Jones formulation to determine viscosity as a function of temperature for these gases. ### What units can I use with Compressible Gas Flow Calc? You can choose between Imperial or SI units within Compressible Gas Flow Calc. This flexibility allows for calculations to be performed according to different regional or project standards. ### How accurate are the results from Compressible Gas Flow Calc? The results in Compressible Gas Flow Calc are based on a modified Newton-Raphson iterative method and have been benchmarked against CFD (Computational Fluid Dynamics) results, indicating a high degree of accuracy. ### What is the price of Compressible Gas Flow Calc? Compressible Gas Flow Calc is a paid application priced at $3.99. This one-time purchase grants access to all its features and calculations. ### Does Compressible Gas Flow Calc have ads? No, Compressible Gas Flow Calc does not contain advertisements. It is a paid application designed to provide an uninterrupted user experience. ## Version history (last 5 releases) ### 5.7 — 2026-01-05 Refresh for new devices and updated iOS ### 5.6 — 2024-12-15 Added ability to clear results history and general refresh for latest iOS and devices ### 5.5 — 2023-10-30 Updated to iOS 17 and iPhone 15 devices ### 5.4 — 2022-10-19 Added scrolling to the main input for easier entry. General bug fixes ### 5.3 — 2019-10-23 Bug fixes ## Apps similar to Compressible Gas Flow Calc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Field Operator](https://appshunter.io/ios/app/field-operator/id1436635281) | 4.5 (2) | Free | Business | | [Your Local Nanny App LLC](https://appshunter.io/ios/app/your-local-nanny-app-llc/id1549576356) | 4.9 (27) | Free | Business | | [Linc MCPTT](https://appshunter.io/ios/app/linc-mcptt/id1585383106) | 2.3 (6) | Free | Business | | [Apex Car Wash](https://appshunter.io/ios/app/apex-car-wash/id1643315351) | 4.4 (5) | Free | Business | | [Cat® Methane Number Calculator](https://appshunter.io/ios/app/cat-methane-number-calculator/id1526710054) | 4.0 (1) | Free | Business | | [Turbo Forms - Digital Forms](https://appshunter.io/ios/app/turbo-forms-digital-forms/id1487793600) | — | Free | Business | ## More apps by Niagara Mobile LLC - [Planet Gravity](https://appshunter.io/ios/app/planet-gravity/id995682820) - [General Trivia](https://appshunter.io/ios/app/general-trivia/id1031649015) - [General Trivia 2](https://appshunter.io/ios/app/general-trivia-2/id1039400001) - [Picture Call](https://appshunter.io/ios/app/picture-call/id1515161613) All apps by Niagara Mobile LLC: https://appshunter.io/developer/1039399999 ## Related topics [mh20 flow](https://appshunter.io/ios/topics/mh20-flow) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*