# Master Gas - Engineer Software > Mobile software for managing gas business operations, customer records, and documentation. (iPhone/iPad app by Little App Company.) - Source: https://appshunter.io/ios/app/master-gas-engineer-software/id720784716 (this page in markdown: same URL + `.md`) - Developer: [Little App Company](https://appshunter.io/developer/406182284) - Category: Business, Productivity - Price: Free - Rating: 3.86/5 from 71 App Store ratings · 20 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 47 MB - Languages: American English - Released: 2013-10-22 - Data updated: 2026-08-20 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/master-gas-engineer-software/id720784716/reviews.md ## What is Master Gas? Master Gas is a new way to manage your gas business, making your working day more productive. So goodbye to paperwork, everything is handled in the app, no more hand written forms, scraps of paper and losing customer details. Here are some of the features • Appointment Diary Keep track of your customer appointments with a built-in diary with fast address lookup. • Customer Database Keep track of all your customers in one place. Store all contact information, past job history and important reminders for each of your customers and landlords. • Gas Certificates and Forms You can create professional Landlord Gas Safety Records (CP12), Maintenance forms, Jobsheets, Warning Notices, Breakdown Reports and Non-Domestic documents. Installation Commissioning, Oil CD10, Oil CD11, Legionella Risk Assessment and more. • Invoicing Get paid quickly with the built-in invoice tool. Create invoices, then print or email to the customer. No more waiting for payment, no more stamps, no more lost cheques. • Estimates and Quotes Create estimates and quotes for you customers from the App. Select from previous stock items or create ad-hoc new items. You can even copy the Estimate/Quote over to an invoice to save time. • Purchase Orders Send your suppliers a purchase order. • Track Expenses Keep track of your expenses on the go. It will cut down on sorting receipts for the Tax Return and your accountant will love it too. • Record Mileage Log down your mileage as you go. At the end of the year you will need this for your accountant. It could save you a small fortune! • Customisable You can add and change any of the lookup lists to suit your needs, add your own logo to the reports and certificates. • Email Email any of the gas forms, invoices or reminder letters from the app to your customer. This means you get all the documents to your customer quickly, leaving no delays for payment making your cashflow a pleasure. You can even email the same documents to yourself with an “Always CC” setting in the app. • Printing Print any of the gas forms, invoices, reminder letters or expense records from the app to an AirPrint printer. • Dropbox integration We have integrated with Dropbox, so you can upload all your documents to dropbox and access these on your computer. This feature works well if you want to batch print on your office computer. • Dedicated Support Team We have a dedicated support team waiting to answer your questions and help you when you need it. We work really hard to make this app useful for you. We value any feedback you have and will try to accommodate as many ideas as possible. If you have a question please contact us, we are always pleased to receive your feedback. ## Key features - Appointment diary with address lookup - Customer database with job history - Create gas safety certificates and forms - Invoicing and quoting tools - Purchase order generation - Expense and mileage tracking - Customizable reports and branding ## Recent user reviews (10 of 20) All indexed reviews: https://appshunter.io/ios/app/master-gas-engineer-software/id720784716/reviews.md ### 5/5 — Couldn’t live without this app *2026-01-21* I'm not normally one to leave a review but after using this app for 11 years now and the constant update from the developer I can honestly say this is the best app I've ever brought! I started as a 1 man band plumber and now I use this as a multi user platform (10 member of staff) this app is seriously good, does everything from a diary to certificates to invoices. Couldn't rate this highly enough ### 5/5 — Best Gas App on the market *2024-03-06* Definitely the best gas app on the market. I’ve tried quite a few and this one is better in every than the others. ### 4/5 — Good app *2023-12-09* Good app, but I can’t get it to sync across my phone and iPad. If it does indeed do that. It’s got all I need for gas forms in a great layout. I use it with three other guys and everyone always comments on how professional it looks. One feature I would like is to be able to include subcontractors as they use different credentials so being able to pick between them would be a great addition. ### 5/5 — By Far The Best Gas & Oil engineer App *2022-07-07* As a sole trader I trialed many gas software apps that would integrate my customer base, diary, accounts , job sheets , and for gas servicing , landlord’s safety checks , warning notice and Oil boiler certificates . This app basically does it all and it’s easy to use and is set up nicely , the forms can be sent via email on site as well as the invoice in no time at all . The presented forms and invoices look professional unlike some apps I tried out. Also price wise, it’s certainly very good value for money. I had previously written a review here saying that the app support was poor, I was completely wrong , and a reminder to me to check my Junk box in my emails. Tho whole app experience has been mainly flawless and it works offline also. So you can still fill everything out and have it ready to send when in signal again. I’d like to thank Steve from the master gas support for his help also, he has been brilliant to deal with. I’d recommend this app to anyone who is self employed in the gas and oil heating trade. It may also be good for bigger businesses as well, but can only talk from my experience. ### 5/5 — Happy customer *2021-02-08* I recently wrote a review due to some issues I was having and a miscommunication, I have since spoken with the developer who has not only sorted these issues but briefed me on some exciting new features that are being released soon, I have been using this app since 2013 and have no plans to change. Highly recommend. **Developer response:** Thank you for the review, and we are hoping the new updates are serving you well! ### 5/5 — This app is all engineer needs *2020-12-01* I have been using this app for several years now and build a quite big database of customers, jobs etc. Once you get used to this app then it really makes life much easier and jobs less time consuming. Would recommend this app to all gas engineers. In a matter of fact few of my fellow gas pals started using this app after my recommendation. Cheers **Developer response:** Thank you for the review and recommending us, we really appreciate your feedback! ### 5/5 — Mastergas for the win *2020-06-20* Mastergas is the best software I have come across for the gas industry for certificates. The team that run it are great and really professional and listen to requirements moving forward. The new part of the app allowing multiple engineers and having the online facility is spot on and I can see constant additions to help run my business. ### 4/5 — Great App but needs updating *2020-06-05* I have the upgraded version and contacted Master Gas about the App freezing whenever I go to the Help Centre on my IPad. It’s says loading then freezes, but this has still not been resolved? If like me you cannot always take your device onto a site and need to fill out the certificate at a later date, you cannot change the inspection date. You must open the certificate on that day and if you don’t the inspection date cannot be changed although you can change the sign off date of both customer and engineer? You have to be carful about the number of characters you use were ever you detail actions work or defects. There is no character limit so you can type what ever you want but it will not all show on the certificate. This is annoying and can be potentially used against you by your customer as specifics of your recommendations can easily be missed off. Especially if like me you itemise your comments. Why doesn’t the box expand to match character count. The attached number of sheets to a certificate doesn’t matter. Missed off information does! Apart from these issues the App is good, but I am disappointed that after using this app now for some time I still have the same issues. Please update this app to allow them to be resolved. ### 5/5 — I've tried many other 'gas apps' and Master Gas for me is by far the best. *2019-10-21* I have been using Master Gas for several years now and without a doubt it is by far the easiest and most adaptable gas engineer software out there. Occasionally a new 'app' will appear in the App Store with free trial periods and I will happily give them a try but always find them cumbersome or lacking in features. Master Gas ticks all the boxes. Diary Customer Database Forms - (Job-sheet, Gas Safety Records, Gas Breakdown/Service Record, Maintenance Checklist, Commissioning Checklist, Warning Notices....) Accounting - (Invoicing, Payment Received, Outstanding Invoices, Estimates/Quotes, Expenses, Mileage.....) One of my favourite features and alone is worth the subscription cost of the 'App' is Reminders, never miss a boiler service again. Servicing is our 'bread and butter' work and we need to keep on top of them for the safe and efficient operation of the customers gas appliances. The customer services is first class to with any issues being responded to promptly. The developer is always open to new ideas for features within the app. I can honestly say my admin work has been simplified since using Master Gas and frees up time to do other things. Keep up the good work Little App Company 👍🏻 ### 5/5 — All you’ll need *2019-10-02* Brilliant app for recording and keeping my service and CP12’s, great layout that can in include your logo so looks very professional. Does everything I need and has other features like invoicing that others might find useful. The support has always been brilliant when I’ve needed it, going above the the call of duty even out of hours, on a few occasions. ## Frequently asked questions about Master Gas ### What is Master Gas used for? Master Gas is designed to help gas engineers and businesses manage their daily operations. It allows for digital creation of gas safety certificates, invoices, quotes, and customer records, replacing traditional paperwork. ### Does Master Gas have ads? No, Master Gas does not contain advertisements. As a paid application, it offers an ad-free experience for users. ### What types of gas certificates can be created with Master Gas? Master Gas allows for the creation of various professional documents including Landlord Gas Safety Records (CP12), Maintenance forms, Jobsheets, Warning Notices, Breakdown Reports, Non-Domestic documents, Installation Commissioning, Oil CD10, Oil CD11, and Legionella Risk Assessments. ### Can I integrate Master Gas with other services? Yes, Master Gas offers Dropbox integration, allowing you to upload all your documents to Dropbox for easy access on your computer. This is useful for batch printing or archiving. ### How often is Master Gas updated? The latest version of Master Gas is 2.9.8, which was last updated on October 3, 2017. While updates have not been frequent recently, the app is designed to be a stable tool for business management. ### What devices support Master Gas? Master Gas is supported on iPhone, iPad, and iPod devices, making it accessible for engineers on the go. ### How does Master Gas help with finances? The app includes an invoicing tool for quick payments and an estimates/quotes feature. It also helps track expenses and log mileage, which can be beneficial for tax returns and accountants. ### What is the user rating for Master Gas? Master Gas has a rating of 3.9 stars based on 71 ratings. This suggests a generally positive user experience, though there is room for improvement. ## Version history (last 5 releases) ### 2.9.8 — 2017-10-03 This update from Apple will improve the functionality of this app. No new features are included. - Signatures and Logo on Jobsheets ### 2.9.7 — 2017-09-29 - iOS11 Bug fixes - Correct issue with signature and logo missing on Jobsheets - Printing now working on AirPrint for iOS11 users - Printing now shows a preview - You can now set a date on Warning Notices ### 2.9.6 — 2017-09-19 - Updates for iOS11 - Dropbox Update - Minor fixes ### 2.9.5 — 2017-08-02 - Further improvements around reminder templates - SMS feature re-instated - Appliance details on all reminder documents - Kane 456 New software versions ### 2.9.4 — 2017-07-20 - New fully customisable reminder letters. You can now customised and create as many reminder letters as you like. - Kane 456 and Kane 457 integration, you can now send results direct to the app. - Export expenses in to a csv file for your accountant - Various tweaks, changes and bug fixes. ## More apps by Little App Company - [Gas Rate Calculator](https://appshunter.io/ios/app/gas-rate-calculator/id406389136) - [UP/1B Calculator](https://appshunter.io/ios/app/up1b-calculator/id6762639006) All apps by Little App Company: https://appshunter.io/developer/406182284 --- *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 2026-08-20.*