# Gastite Sizing App > Calculates required Gastite® CSST size for gas installations based on input parameters. (iPhone/iPad app by Gastite Systems Limited.) - Source: https://appshunter.io/ios/app/gastite-sizing-app/id1537998852 (this page in markdown: same URL + `.md`) - Developer: [Gastite Systems Limited](https://appshunter.io/developer/1537998855) - Category: Utilities - Price: Free - Age rating: 4+ - Requires: iOS 13.0 · 15 MB - Languages: English - Released: 2021-01-30 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gastite-sizing-app/id1537998852/reviews.md ## What is Gastite Sizing App? With the Gastite® Sizing APP it is easy to calculate the size of Gastite® CSST your next gas installation will require. Simply add basic information, including gas type, CSST length and appliance Max KW, and the app will instantly identify the size of Gastite® CSST the installation will require. Key features include: • Easy navigation • Intuitive, user-friendly design • Choose from natural gas or LPG depending on the installation • Access a range of frequently asked questions • Download the comprehensive Design & Installation Guide • Contact us Cost-effective and flexible, the Gastite® system has been designed to offer ease of installation and is suitable for both internal and external installation, including direct burial, according to manufacturer’s instructions. Supplied in one continuous, pre-marked by the metre, length, Gastite® CSST requires only simple hand tools and no hot works for successful installation. The Gastite® system should only be installed according to manufacturer’s instructions. Gas installation work should only be carried out by a business or self-employed operative who is a member of a class of persons approved by the Health & Safety Executive (HSE). The current registration body is the Gas Safe Register. ## Key features - CSST sizing calculation - Natural gas or LPG selection - Access to FAQs - Downloadable installation guide - User-friendly design - Contact support ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/gastite-sizing-app/id1537998852/reviews.md ### 5/5 — Great tool for ALL gas engineers *2021-02-02* I’ve downloaded the 2021 Gastite app and I am impressed with how useful and informative it is. This app is the cherry on top of the cake for what is already a GREAT product. It’s navigates so well with technical help on sizing and installing Gastite, at your fingertips. The sizing tool allows me to quote instantly on site and if there is anything that I can’t do, the Gastite team are always on hand to help. ## Frequently asked questions about Gastite Sizing App ### What is the Gastite Sizing App used for? The Gastite Sizing App is used to easily calculate the required size of Gastite® CSST for your next gas installation. You simply input details like gas type, CSST length, and appliance power to get an instant sizing recommendation. ### Is the Gastite Sizing App free to use? Yes, the Gastite Sizing App is completely free to download and use. It does not require any payment or subscription. ### What devices does the Gastite Sizing App support? The Gastite Sizing App is available for iPhone and iPod devices. It is designed for mobile use on these platforms. ### How often is the Gastite Sizing App updated? The Gastite Sizing App was last updated on August 30, 2023, with version 1.6. This indicates regular maintenance and potential feature additions. ### Can I use the Gastite Sizing App for both natural gas and LPG? Yes, the app allows you to choose between natural gas or LPG, depending on the specific requirements of your installation. This flexibility ensures accurate sizing for different gas types. ### Where can I find more detailed installation information? The Gastite Sizing App provides access to a comprehensive Design & Installation Guide, which you can download directly from the app. This guide offers in-depth instructions for proper installation. ### What is the age rating for the Gastite Sizing App? The Gastite Sizing App has an age rating of 4+. This suggests it is suitable for a wide range of users, though its primary audience is professional installers. ### Does the Gastite Sizing App have ads? No, the Gastite Sizing App does not contain advertisements. It provides an ad-free experience for users focused on their installation calculations. ## Version history (last 5 releases) ### 1.6 — 2023-08-30 Updates for latest versions of IOS, bug snagging, and fixes. ### 1.5 — 2021-08-27 Push Notification updates. ### 1.4 — 2021-03-25 General updates and bugfixes ### 1.3 — 2021-03-06 App Icon Update ### 1.2 — 2021-02-09 Included haptic feedback on scroll, minor bugfixes. ## Apps similar to Gastite Sizing App | App | Rating | Price | Category | | --- | --- | --- | --- | | [Resideo Pro](https://appshunter.io/ios/app/resideo-pro/id1470259201) | 3.8 (17) | Free | Utilities | | [Pipe Flow Wizard - Calculator](https://appshunter.io/ios/app/pipe-flow-wizard-calculator/id1346589732) | 4.5 (98) | Free | Utilities | | [Decibel : dB sound level meter](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795) | 4.6 (36,014) | Free | Utilities | | [Viessmann Access](https://appshunter.io/ios/app/viessmann-access/id1533222623) | — | Free | Utilities | | [Oil Nozzle Output Calculator](https://appshunter.io/ios/app/oil-nozzle-output-calculator/id496184302) | — | $4.99 | Utilities | | [MiREG Plus](https://appshunter.io/ios/app/mireg-plus/id1282587493) | — | Free | Utilities | --- *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 2026-06-05.*