# Gas Engineer Software - GES — For gas, oil & plumbing pros > All-in-one software for gas, oil, and plumbing professionals to manage certificates, quotes, invoices, and schedules. (iPhone/iPad app by Software Works for You Ltd.) - Source: https://appshunter.io/ios/app/gas-engineer-software-ges/id771853285 (this page in markdown: same URL + `.md`) - Developer: [Software Works for You Ltd](https://appshunter.io/developer/771853288) - Category: Business, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 14.0 · 286 MB - Languages: American English - Released: 2013-12-14 - Data updated: 2026-08-30 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/gas-engineer-software-ges/id771853285/reviews.md ## What is Gas Engineer Software? Gas Engineer Software (GES) is more than just an easy-to-use gas certificate app. It’s an all-in-one gas engineer software perfect for heating professionals. Whether you’re a gas engineer, oil engineer, or plumber, use GES to create all your industry certificates & records, issue quotes & invoices, manage schedules, and lots more. Save hours each week and run a successful heating & plumbing business on any device, from anywhere, and at any time. • Average of 6.6 hours saved each week • Average revenue growth of 37% in the first year • Trusted by 6,000+ businesses • Set up in 3 minutes OVERVIEW — MAIN FEATURES • Gas app for issuing certificates, records, job sheets • Send quotes and issue invoices • Schedule jobs with an integrated calendar • Manage your team from anywhere • Automated boiler service reminders • Manage your customer database • Easy & organised job management • Accounting software integrations • Sync to web portal for easy office use • Full offline access OIL & GAS CERTIFICATE APP • Easily create all oil and gas certificates • Professional & accurate records compliant with the latest regulations. • Easily track, organise & manage historical records. GAS CERTIFICATES • Homeowner Gas Safety Record • Landlord Gas Safety Record • Gas Warning Notice • Gas Service Record • Gas Breakdown Record • Installation / Commissioning Checklist • ND Gas Safety Record • Leisure Industry Gas Safety Record • LPG Gas Safety Record • ND Gas Testing & Purging Record • ND Catering Record OIL CERTIFICATES • CD/10 Oil Firing Installation Completion Report • CD/11 Oil Firing Servicing and Commissioning Report • CD/12 Landlord Oil Installation Check • CD/14 Oil Warning and Advice Notice • TI/133D Domestic Oil Storage, Tank Spillage and Fire Risk Report QUOTING & INVOICING • See all invoices & unpaid jobs & let GES chase late payers with automatic reminders. • Send professional & customisable invoices seconds after the job has finished. • Get your quotes in before your competitors. Use template line items for fast quotes. • Quickly turn your quotes & estimates into invoices at the click of a button. JOB SCHEDULING • Simple & easy job creation for your team. • See where your engineers are and who is available at a glance. • Let engineers know what their schedule is without coming to the office. • Eliminate booking errors and conflicts. AUTOMATED REMINDERS • Email & SMS boiler service reminders to find extra work. • Quote follow-ups to win more jobs. • Invoice payment reminders so you don’t have to chase late payers. • All reminders are fully customisable USER & TEAM MANAGEMENT • Control what your team can see & do with user roles. • Easily assign jobs to the right engineers at the right time. • Full job history so you always know the ‘who’, ‘what’ & ‘when’ of every job. • Our gas app is very easy & quick for your team to use. CUSTOMER MANAGEMENT SOFTWARE (CRM) • Access detailed customer information in seconds • All information available on your mobile device • Keep all customer information in one consolidated place. • See which customer hasn’t paid & let our software send automated reminders. SOFTWARE INTEGRATIONS • Xero, QuickBooks & Sage accounting software • Anton, Kane & TPI flue gas analysers • Crezco open banking payments REQUEST A DEMO If you want to see the app in action or get a better idea of how it works, book a demo with our team. We’ll give you a thorough walkthrough & answer any questions. https://gasengineersoftware.co.uk/gas-engineer-software-demo/ QUESTIONS? Contact our customer support team at support@gasengineersoftware.co.uk or 0207 129 7058 ## Key features - Create industry certificates - Issue quotes and invoices - Schedule jobs with calendar - Manage team and customers - Automated service reminders - Offline access ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Single Engineer - 12 Months Subscription | $19.00 | one-time | ## Recent user reviews (10 of 64) All indexed reviews: https://appshunter.io/ios/app/gas-engineer-software-ges/id771853285/reviews.md ### 5/5 — Grew with my heating and plumbing business *2026-03-26, version 5.74.0* Started using Gas Engineer Software when it was just me, I needed something simple for certs and invoices without the evening paperwork. Did the job perfectly. Now I've got three engineers and the app's handled the growth without missing a beat. Scheduling, customer history, job tracking across the team, all in one place. Didn't need to switch to anything else. Reliable day to day, support team are quick when you need them. If you're a sole trader worried you'll outgrow it, you won't! ### 1/5 — Not useful *2025-05-23, version 5.59.1* Not a straight forward setup. They should ask heating engineers before setting up such an app. The writing is so small that will send you to the opticians. The address is in red with underlines???? Why, let’s make it even harder to read. All round poor app. ### 1/5 — Expensive *2025-01-19, version 5.55.0* Been using this software for many years. Not seen any real improvement in it. The price keeps going up and up. Greed springs to mine. ### 5/5 — Best app for heating and plumbing *2025-01-08, version 5.54.2* Great app to create and sent all certificates, schedule jobs and manage jobs and engineers. I’ve been using it for almost a year and love it! ### 5/5 — Does everything we need. *2024-06-06, version 5.48.0* Been using it since I set my business up over 3 years ago. Everything works well although we don’t use everything the software is capable of. The team are constantly improving the software. Andy ### 5/5 — You won’t be disappointed 👍🏽 *2024-06-04, version 5.47.0* We have been using this for a few years now, all our staff are familiar with the system, easy to use, the developers are constantly upgrading the system to make it easier / better, any issues we have, we can ring them up, there very helpful and get us back up and going instantly ( mainly our errors ) add photos to each job, email to the customer, looks very professional and in a tap of a button we can also look at all our previous visits that any engineer has had at a job 100% happy with this software and I’m glad we made the jump from paper copy to this software when we did, having a boss that is stuck is his old ways and convincing him this is the way forward has really paid off & he now loves it too 👍🏽 ### 5/5 — Game Changer! *2024-06-03, version 5.47.0* Every heating company should use this app. As a business tool it does so much. Completely changed the way we work and looks very professional. ### 5/5 — Worth every Penny *2024-06-03, version 5.47.0* If you’re a self employed gas engineer you need this app, it literally does everything, all my certs (gas, oil, lpg, domestic and commercial) and all my quotes and invoicing. Plus it remembers everything so when you go back to a property the following year half the paperwork is done for you. ### 5/5 — Recommend *2024-06-03, version 5.47.0* I’ve used this software for years. It’s helped my business no end with ease of quoting with templates and invoicing with reminders. A data base of customer, address and appliance details which becomes invaluable. The servicing reminders pay for the software on its own. ### 5/5 — Best heating app *2023-06-11, version 5.28.0* I tried a couple of apps on trail this was the best by far so I began using app and only regret is I should off got it years ago it’s fantastic and you can get a free One to one training session really helpful I can’t recommend it enough fantastic app really reliable and has changed my heating business more than any other product I have used ## Frequently asked questions about Gas Engineer Software ### What does Gas Engineer Software do? Gas Engineer Software (GES) is an all-in-one solution for gas, oil, and plumbing professionals. It helps you create industry-specific certificates and records, issue quotes and invoices, manage job schedules, and organize customer information. The app is designed to save you time and help grow your business. ### What types of certificates can I create with this app? The app supports the creation of a wide range of gas certificates, including Homeowner Gas Safety Record, Landlord Gas Safety Record, and Gas Service Record. It also facilitates the creation of various oil certificates like CD/10 Oil Firing Installation Completion Report and CD/11 Oil Firing Servicing and Commissioning Report, ensuring compliance with the latest regulations. ### Is Gas Engineer Software free to use? The application is available for free download and offers in-app purchases. This model allows users to access basic functionalities and then purchase additional features or services as needed to suit their business requirements. ### Can I use this app offline? Yes, the app offers full offline access. This means you can create certificates, manage jobs, and access customer information even when you don't have an internet connection, ensuring productivity in any location. ### How does this app help manage my business operations? GES helps manage your business by streamlining certificate creation, simplifying quoting and invoicing with automated reminders for late payments, and providing an integrated calendar for efficient job scheduling. You can also manage your team's schedules and customer database, all from your mobile device. ## Version history (last 5 releases) ### 5.93.1 — 2026-08-27 Multiple invoice discounts are now here! Add more than one discount to an invoice from your app. You'll also find in this update: ● Calendar day view now shows the weekday ● Appointment date changes save correctly for everyone ● Appliance inspection saves are no longer blocked ● Certificate emails include attachments once only ● A Blue Flame Cond. burner option for oil appliances ● Various behind-the-scenes performance improvements ### 5.92 — 2026-08-20 Pipe Sizing Calculator is now in Tools & Manuals! Enter gas load, pipe type, length and fittings to see pressure drop instantly. You'll also find in this update: ● Quote statuses: Pending, Accepted, Declined, Cancelled and Expired ● Filter quotes by status and see status on quote PDFs ● New quote actions, including accept, decline, cancel and convert to invoice ● More reliable email sending, including after emailing events ● Various behind-the-scenes performance improvements ### 5.91 — 2026-08-12 AI tools now feel more at home in Gas Engineer Software. Certificate checks and drafting screens now use our familiar app colours throughout. You'll also find in this update: ● Email template placeholders now fill in more reliably, including event end times ● You can rate the app more easily when prompted ● Various behind-the-scenes performance improvements ### 5.90 — 2026-08-06 You can now update a job’s status when approving a record. Keep your outstanding jobs tidy as you finish work. You'll also find in this update: ● A prompt to use a recent open job when creating a record for the same property ● Invoices default the job status to Completed when approved ● The finalise record message is now centred ● Cost template entries now show in your sync error list ● Various behind-the-scenes performance improvements ### 5.89.0 — 2026-07-29 Landlord names can now be added to job addresses. Great for letting agent work where the landlord and tenant differ. You'll also find in this update: ● Landlord names show on Landlord Gas Safety Certificates from the job address ● Draft certificates for unsaved jobs sync more reliably ● Job photos added on another device now load and open as expected ● Various behind-the-scenes performance improvements ## More apps by Software Works for You Ltd - [FieldRocket App](https://appshunter.io/ios/app/fieldrocket-app/id1610558433) - [GES Gas Pipe Sizing Calculator](https://appshunter.io/ios/app/ges-gas-pipe-sizing-calculator/id6771778655) All apps by Software Works for You Ltd: https://appshunter.io/developer/771853288 ## Related topics [gas engineer](https://appshunter.io/ios/topics/gas-engineer) · [gas certificate app](https://appshunter.io/ios/topics/gas-certificate-app) · [gas ventilation calculator uk](https://appshunter.io/ios/topics/gas-ventilation-calculator-uk) · [software engineering pro](https://appshunter.io/ios/topics/software-engineering-pro) · [gda software](https://appshunter.io/ios/topics/gda-software) · [gas digital](https://appshunter.io/ios/topics/gas-digital) · [gas rate calculator](https://appshunter.io/ios/topics/gas-rate-calculator) · [tempworks software](https://appshunter.io/ios/topics/tempworks-software) --- *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 2026-08-30.*