Best Gas Engineer Software & Apps UK (2026)
Running a Gas Engineering Business Is Hard Enough Without the Admin Making It Worse
The best apps and software for gas engineers in the UK take the admin burden off your plate so you can focus on the work. Whether you’re a sole trader gas engineer or running a small heating and plumbing business, the right software handles your quotes, jobs, invoices, and scheduling in one place without requiring you to be a tech expert to use it.
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In trade groups, gas engineers describe a familiar pattern. Work is either feast or famine. When it’s quiet, the pressure to get your name out there and win new jobs is intense. When it’s busy, the admin piles up and invoices go out late. One gas engineer posted recently that after two years of solid work things had gone quiet and he was starting to panic, asking for advice on how to get more enquiries beyond just relying on Facebook. That’s the reality for most sole trader gas engineers and the right software addresses both sides of that problem.
Quick Picks: Best Software for Gas Engineers UK
Best Overall: Tradify
Purpose-built for tradespeople, Tradify handles job management, quoting, invoicing, scheduling, and timesheets in one connected platform. The most practical choice for sole trader gas engineers and small heating businesses.
Best for Growing Teams: Jobber
More powerful scheduling and client automation for gas engineering businesses with multiple engineers or a high volume of service and maintenance contracts. Also the strongest option for automated boiler service reminders.
Best for Accounts: Xero
MTD-compatible accounting that handles invoicing, VAT returns, and self assessment for gas engineers who want to manage their own books.
Gas Engineer Software Comparison: At a Glance
| Software | Best For | Starting Price | Free Trial |
|---|---|---|---|
| Tradify | Sole traders & small firms | ~£34/month per user | 14 days |
| Jobber | Teams + service contracts | $29/month (USD, annual) | 14 days |
| ServiceM8 | High-volume reactive callouts | Free, then from £25/month | Yes |
| Gas Engineer Software | CP12 and gas certificates | £18/month (annual, ex VAT) | 14 days |
| Xero | Accounting + MTD compliance | £18/month | 30 days |
| QuickBooks | Accounting + MTD compliance | £10/month | 30 days |
| FreeAgent | Free with NatWest/RBS/Mettle | Free (qualifying accounts) | Free tier |
Why Gas Engineers Need Better Software in 2026
The gas engineering trade faces a specific challenge that other trades don’t always share to the same degree: the combination of reactive emergency work and planned maintenance contracts alongside compliance and certification requirements creates an admin load that’s heavier than most trades.
Gas Safe certificates, boiler service records, landlord certificates, and installation documentation all need to be produced, stored, and retrievable. Managing all of that alongside job scheduling, quoting, and invoicing on paper or across multiple disconnected tools is a significant time drain every week.
The right job management platform handles the documentation alongside the operational work, keeping everything in one place and accessible from your phone on site.
The Best Job Management Software for Gas Engineers
1. Tradify: Best Overall for UK Gas Engineers
Tradify is purpose-built for tradespeople and works well for gas engineers across both reactive work and planned maintenance. The workflow covers the full job lifecycle. You get an enquiry, create a job, build a quote from your saved price list, schedule the work, track time on site, attach photos and certificates, and invoice when the work is done. Everything connects without re-entering information between systems.
For gas engineers doing boiler installations and servicing, the ability to attach photos and documents directly to job records is particularly valuable. Before and after photos, Gas Safe certificates, and any site documentation sit against the specific job record rather than scattered across email and a camera roll. That organisation matters both for compliance and for resolving any future queries from customers or landlords.
The quoting module lets you build quotes from a saved price list of your standard labour rates and common parts, which speeds up the quoting process significantly on bread-and-butter jobs like boiler services, gas hob installations, and central heating work.
Tradify also has built-in UK gas certificates, so you can create, sign and email a Landlord/Homeowner Gas Safety Record (CP12), Service Maintenance Record, Gas Warning Notice and installation and commissioning records straight from the job, without a separate certificate app.
Key features: Job management, quoting from saved price lists, scheduling, timesheets, invoicing, UK gas certificates including CP12, document and photo attachments, purchase orders, GPS tracking, integrates with Xero and QuickBooks.
Pricing: From ~£34/month per user. Free 14-day trial, no card required.
Best for: Sole trader gas engineers and small heating businesses wanting one connected platform from first enquiry to final invoice.
2. Jobber: Best for Gas Engineering Businesses with Teams
Jobber steps up where Tradify starts to feel stretched when you’re managing multiple engineers across a mix of emergency callouts, planned maintenance visits, and installation work. The scheduling board handles the complexity of a busy heating business diary well, with drag-and-drop reallocation when emergency callouts disrupt planned work.
The automated service reminders are particularly useful for gas engineers with boiler service contracts. Jobber can send automatic reminders to customers when their annual service is due, removing the manual follow-up process that most sole traders either forget or find too time-consuming to do consistently. That automation alone can significantly improve service contract renewal rates.
Key features: Job scheduling, automated service reminders, client hub, invoicing, online payments, two-way texting, GPS tracking, reporting.
Pricing: Priced in US dollars, from $29/month on annual billing ($49 month to month). Free 14-day trial.
Best for: Gas engineering businesses with multiple engineers or a high volume of service contracts requiring systematic follow-up.
3. ServiceM8: Best for High-Volume Reactive Work
ServiceM8 suits gas engineers doing a high volume of reactive callouts and emergency work rather than larger installation projects. The dispatch board and job queue system works well for a fast-moving diary with multiple short jobs per day across different locations. If your work is predominantly gas safety checks, boiler repairs, and reactive heating callouts, ServiceM8 handles that pace well.
Pricing: Free plan (1 user, 30 jobs a month), then from £25/month based on monthly job volume.
Best for: Gas engineers with a high volume of reactive callouts and emergency work.
4. BoilerFix AI: Best On-Site Technical Reference
BoilerFix AI is first and foremost a technical reference app that sits alongside Tradify or Jobber. It was built by a working Gas Safe registered engineer and puts fault codes, parts lists and service mode data for 13 boiler brands on your phone, instead of a van full of manufacturer PDFs.
What we found when we tested it: we checked its data against the real manuals rather than taking the numbers on trust. A Worcester Greenstar 30i EA 227 fault lookup gave accurate causes, steps and parts. The Greenstar 30si parts list returned 27 parts with the manufacturer’s own part numbers. The Worcester 24 CDi service mode entry gave the full entry procedure plus CO2 and CO targets with tolerances. One real catch: the “exploded diagram” on the 30si was a scanned parts table, not a pictorial diagram. The founder confirmed the fix the same day, and proper interactive diagrams are coming through a PartsArena integration.
Business features (founder-described, not yet tested by us): BoilerFix AI also says it handles automatic service reminders (the next service date is logged when you complete a certificate, and the customer is emailed a month before it’s due), automatic chasing of overdue invoices, income and expense bookkeeping, calculators including IGEM/UP/1B tightness test, gas rate, heat loss and pipe sizing, and certificates for commercial, oil, LPG and heat pump work plus RAMS.
Key features: 1,868+ fault codes, 1,760+ service mode records, 209,482 catalogued parts, certificates and RAMS, customer hub with service reminders and invoice chasing, and a QR-code “Boiler Passport” homeowners can scan for job history, certificates and the boiler manual.
Pricing: From £3.99/month, Pro normally £5.99/month. iOS, Android and web.
Reader offer: use code TRADESTACK to get BoilerFix AI Pro for £3.99/month instead of £5.99, for as long as you stay subscribed (first 100 sign-ups). Claim the offer →
Best for: Gas Safe engineers who want fault codes and parts data on site. Read our full BoilerFix AI review for the testing in detail.
CP12 and Gas Safety Certificate Software
If you are looking for CP12 software or a gas safe certificate app, there are two routes: a job management platform with certificates built in, or a dedicated certificate app that you use alongside your quoting and invoicing.
- Tradify (from ~£34/month per user): certificates built into the job, including the Landlord/Homeowner Gas Safety Record, Service Maintenance Record, Gas Warning Notice, Installation/Commissioning/Decommissioning Record, Gas Breakdown Service and Domestic Gas Testing & Purging, plus oil forms (CD/10, CD/11, CD/12). Best if you want jobs, quotes, invoices and certificates in one app.
- Gas Engineer Software (from £18/month per user on an annual plan, ex VAT): built for gas engineers, with CP12 landlord certificates, boiler service records and oil certificates on every plan. 14-day free trial with no card details needed.
- Gas Cert by iCertifi: a dedicated certificate app covering 30 certificate types, including the CP12, the CP16 and CP17 non-domestic records, oil certificates and heat pump commissioning records, with automatic customer reminders and offline working. Available on iOS and Android, though syncing between devices is Apple only.
- BoilerFix AI (from £3.99/month): mainly a fault code and parts reference, but it also includes 28 certificate types, and the founder says these cover commercial, oil, LPG and heat pump work plus RAMS, with a customer hub and service reminders.
The app only records your readings and produces the paperwork. The landlord gas safety check itself still has to be carried out by a Gas Safe registered engineer.
Boiler Service Reminder Software: What to Use
Boiler service reminders are one of the most underused tools in a gas engineer’s business. If you’ve serviced a customer’s boiler once, they’re your best source of repeat work the following year, but only if they remember to rebook. Most don’t, unless you remind them.
Jobber is the strongest option for automated boiler service reminders. You can set up automated sequences that send the customer a reminder email or text when their annual service is approaching, then follow up if they haven’t booked. The whole process runs without you having to do anything after the initial setup.
Tradify handles service scheduling but doesn’t have the same level of automated client reminder sequences as Jobber. For sole traders with a smaller customer base, manually scheduling follow-up tasks in Tradify is manageable. For businesses with hundreds of service customers, Jobber’s automation earns its keep.
BoilerFix AI is a much cheaper route for sole traders. According to the founder, when you complete a certificate the next service date is logged automatically and the customer gets an email a month before it’s due. We haven’t tested the reminders ourselves yet, but at £3.99/month with our reader code it’s worth a look if Jobber is more than you need.
For a free approach: Google Calendar with recurring annual reminders per customer works, but it’s manual and doesn’t scale. If you’re just starting out it’s a reasonable interim solution before investing in proper software.
Best Accounting and Invoicing Software for Gas Engineers
Xero: Best for Gas Engineers Managing Their Own Accounts
Xero handles invoicing, expense tracking, bank reconciliation, VAT returns, and Making Tax Digital compliance in one platform. For gas engineers approaching the VAT threshold or already registered, having MTD-compliant software in place is not optional. Xero connects directly with Tradify so your job invoices flow through to your accounts automatically.
Pricing: From ~£18/month. 30-day free trial available.
QuickBooks: Strong Alternative to Xero
QuickBooks covers the same ground as Xero and is widely used by UK sole traders. Both are MTD-compatible and both connect to Tradify. The choice between them is largely personal preference or whatever your accountant recommends.
Pricing: From ~£10/month. Free trial available.
FreeAgent: Free with NatWest, RBS, and Mettle
Full accounting and invoicing software included free with NatWest, RBS, Ulster Bank, and Mettle business accounts. If you bank with any of those providers, set this up immediately.
Pricing: Free with a qualifying business account. Otherwise from ~£33/month.
What Should a Gas Engineer Look for in Software?
Document and Certificate Storage
Gas Safe certificates, landlord CP12 certificates, and installation records need to be stored and retrievable. Software that attaches documents directly to job records keeps your compliance paperwork organised without a separate filing system.
Fast Quoting
Gas engineers losing work to competitors are often losing on response speed. Software with a saved price list of your standard parts and labour rates means quotes go out in minutes rather than the following day.
Service Contract Management
Annual boiler services and landlord gas safety checks are recurring revenue that needs systematic management. Automated reminders when services are due keep your renewal rate high without manual follow-up work.
Mobile First
You’re on site all day. Any software that only works properly on a desktop will get abandoned. Tradify and Jobber both have strong mobile apps designed for field use.
MTD Compatibility
If you’re VAT registered, your accounting software must be MTD-compatible. QuickBooks, Xero, and FreeAgent all are.
Which Should You Choose?
The Verdict
For most UK sole trader gas engineers and small heating businesses, Tradify is the right starting point. It’s trade-specific, sensibly priced, works on your phone, and handles the full workflow from quote to invoice with document attachments for certificates and photos.
If you’re managing a team of engineers and want automated service reminders and stronger client communication tools, step up to Jobber and use the 14-day free trial to assess whether it fits your business.
On the tools side, add BoilerFix AI for fault codes and parts data on site. If budget is the priority, our Traddie review for gas engineers covers a cheaper UK-built alternative to Tradify.
Pair either with Xero for your accounts and you have a complete setup from first job to tax return.
Frequently Asked Questions
Tradify is the best all-round software for gas engineers in the UK. It covers job management, quoting, scheduling, timesheets, invoicing, and document storage in one connected platform. It’s purpose-built for tradespeople, works from your phone on site, and handles Gas Safe certificate and photo attachments against specific job records.
There is no official survey of the software UK gas engineers use, but the main options are general trade platforms such as Tradify, Jobber and ServiceM8, often alongside a gas certificate app such as Gas Engineer Software or iCertifi Gas Cert for CP12s. Tradify suits sole traders and small firms, and has gas certificates built in. Jobber suits larger heating businesses with many service contracts. ServiceM8 suits fast-moving reactive callout work.
Tradify is the best software for sole trader gas engineers. It’s straightforward enough to set up yourself in an afternoon, priced at around £34 per month, and covers everything a sole trader needs: quoting, job management, invoicing, scheduling, and document storage. The mobile app works well on site. Most sole traders find Jobber’s extra features aren’t necessary until they start taking on staff or managing a large number of service contracts.
Jobber is the best option for automated boiler service reminders. It can automatically send customers reminders when their annual boiler service is due and follow up if they haven’t booked, without any manual effort after the initial setup. Tradify supports service scheduling but doesn’t have the same automated reminder sequences. For sole traders with a smaller customer base, manually scheduling annual follow-up tasks in Tradify is a workable alternative.
Yes, for a small workload. ServiceM8 has a free plan for one user and up to 30 jobs a month that covers quoting, scheduling and invoicing, though the full app is iPhone only. For accounting, FreeAgent is free with qualifying NatWest, RBS, or Mettle business accounts, and Invoice Ninja has a free tier for basic invoicing. Tradify, Jobber and Gas Engineer Software all offer 14-day free trials.
Tradify, our top pick for UK gas engineers, costs around £34 per month per user. Jobber starts from $29/month on annual billing ($49 month to month), priced in US dollars. ServiceM8 has a free plan for up to 30 jobs a month, with paid plans from £25/month. For accounting, Xero starts at £18 per month and QuickBooks from £10 per month. Most sole trader gas engineers running one job management platform plus accounting software spend around £50 per month in total.
If you want one app for jobs, quotes, invoices and certificates, Tradify has the Landlord/Homeowner Gas Safety Record (CP12) and other UK gas certificates built in, from around £34/month. If you only need certificates, Gas Engineer Software (from £18/month on an annual plan) and iCertifi Gas Cert are dedicated gas certificate apps. BoilerFix AI (from £3.99/month) also includes 28 certificate types alongside its fault code library.
Affiliate Disclosure: Some links on this page are affiliate links. If you sign up to a tool through a link on TradeStack HQ, we may earn a commission at no extra cost to you. We only recommend tools we believe are genuinely useful for UK tradespeople. Our editorial opinions are our own.