# Gas Rate Heat Input Calculator — HVAC - Gas Rate & Heat Input > HVAC tool for calculating boiler gas rate and heat input. (iPhone/iPad app by Claire Holmes.) - Source: https://appshunter.io/ios/app/gas-rate-heat-input-calculator/id415565802 (this page in markdown: same URL + `.md`) - Developer: [Claire Holmes](https://appshunter.io/developer/397229185) - Category: Business, Utilities - Price: $1.99 - Age rating: 4+ - Requires: iOS 9.0 · 44 MB - Languages: English - Released: 2011-01-28 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gas-rate-heat-input-calculator/id415565802/reviews.md ## What is Gas Rate Heat Input Calculator? This app is for anyone wishing to gas rate their boiler. Are your bills on the high side and need work out if the meter or boiler is at fault? Are you a heating engineer? If you answered YES to any of these questions then this could be the app for you. The app include a hand information guide which takes you through the steps involved in gas rating. Features include: - Imperial and metric meters - 1 & 5 cubic feet imperial meter - Choose from Natural Gas, enter you own calorific values or select from a predefined list. - Easy Start / Stop timer. - +/- 5% variance option for results - Quick clear/reset function - "Always on" display whilst in timer mode. - Quick reference of calorific values for 7 standard gasses. - Results can be copied to clipboard for emailing / sending via text. Results are displayed in - Gross heat input in BTU/hr and KW/hr - Net Heat Input in BTU/hr and KW/hr We endeavour to make our calculations as accurate as possible, where any errors, or inaccurate results occur, we welcome your feedback via the app support option. This enables us deliver better, more relevant applications via continual updates. ## Key features - Imperial and metric meter support - Natural gas and custom calorific values - Easy start/stop timer - Variance option for results - Results in BTU/hr and KW/hr - Copy results to clipboard ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/gas-rate-heat-input-calculator/id415565802/reviews.md ### 1/5 — App does not even open *2022-06-10* Don’t waste ur money ! App don’t even open ### 3/5 — Update?? *2019-10-24* When are you going to update it for the latest IOS for IPhone , class app but need to get it to work for the update ### 1/5 — No updates *2017-08-23* Developer not updating the app for future iOS versions as of ios10 **Developer response:** We are in the process of updating the app. This should be ready within the next 2 weeks. ### 5/5 — Great app *2012-09-04* I'm a service engineer and use it all the time! I've tested it a few times by doing the math and it's spot on! ### 1/5 — Mr *2012-03-26* Useless rubbish I'm better off doing gas rates old fashion way ### 4/5 — Gas rate & heat input calculator *2011-02-13* Good app, nice layout, works well, good colour contrast. Would like results slightly larger to save getting the spectacles out & maybe list CV's on info page for Propane & Butane gases to save looking them up. ### 5/5 — Rate My Gas App *2011-02-02* Fantastic wee app that does what it says. Will stop me having to write on my hand for readings. ## Frequently asked questions about Gas Rate Heat Input Calculator ### What is the Gas Rate Heat Input Calculator used for? The Gas Rate Heat Input Calculator helps users determine their boiler's gas rate and heat input. This can assist in diagnosing issues with meters or boilers and assessing energy efficiency. ### What types of meters does the Gas Rate Heat Input Calculator support? The app supports both imperial and metric meters, including specific options for 1 and 5 cubic feet imperial meters. ### Can I use the Gas Rate Heat Input Calculator with different types of gas? Yes, you can choose Natural Gas, enter your own calorific values, or select from a predefined list of calorific values for 7 standard gasses. ### How are the results displayed in the Gas Rate Heat Input Calculator? Results are displayed in both Gross Heat Input and Net Heat Input, measured in BTU/hr and KW/hr, providing comprehensive data. ### Is the Gas Rate Heat Input Calculator available on Android devices? Currently, the Gas Rate Heat Input Calculator is supported on iPhone and iPod devices. Information on Android availability is not provided. ### How often is the Gas Rate Heat Input Calculator updated? The app was last updated on October 17, 2018, with version 3. The developer welcomes feedback for future improvements and relevant applications. ### What is the price of the Gas Rate Heat Input Calculator? The Gas Rate Heat Input Calculator is a paid application, priced at $1.99. ### Does the Gas Rate Heat Input Calculator have ads? No, the Gas Rate Heat Input Calculator does not contain advertisements. ## Version history (last 3 releases) ### 3 — 2018-10-17 Working in all recent IOS versions. Added audio code to start/stop timer. Copy data to clipboard functionality. Stopped data being cleared whilst in timer mode. Refreshed UI. ### 2 — 2011-03-23 After feedback - added in new functionality : Rotate the device 90 degrees to display the results full screen in a clear and high contrast layout. Quick reference gas picker option for 7 standard gasses. ### 001 — 2011-01-28 No release notes. ## Apps similar to Gas Rate Heat Input Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Invoice Maker by Invoice Home](https://appshunter.io/ios/app/invoice-maker-by-invoice-home/id1435778692) | 4.6 (362) | Free | Business | | [SPS Smart Production Solutions](https://appshunter.io/ios/app/sps-smart-production-solutions/id1002392731) | — | Free | Business | | [SafetyCulture (iAuditor)](https://appshunter.io/ios/app/safetyculture-iauditor/id499999532) | 4.7 (30,704) | Free | Business | | [AI Business Card Maker QR](https://appshunter.io/ios/app/ai-business-card-maker-qr/id1468005938) | 4.7 (1,424) | Free | Business | ## More apps by Claire Holmes - [Radiator / BTU Calculator](https://appshunter.io/ios/app/radiator-btu-calculator/id397251605) - [Carpet calculator / estimator](https://appshunter.io/ios/app/carpet-calculator-estimator/id406825264) - [Clapperboard / Clapboard Slate](https://appshunter.io/ios/app/clapperboard-clapboard-slate/id411034432) - [Pipe Offset Calculator](https://appshunter.io/ios/app/pipe-offset-calculator/id426519976) - [BMI Calc - Body Mass Index](https://appshunter.io/ios/app/bmi-calc-body-mass-index/id438060833) All apps by Claire Holmes: https://appshunter.io/developer/397229185 --- *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 2026-06-10.*