Best Job Management App for Gas Engineers UK 2026: Boiler Jobs, Certificates and Compliance
Written by Tom Ellis · Senior Trades Editor
Last updated: August 2026
Quick Answer
Quick wins
- Always choose an app that stores Gas Safe certificate numbers against each job record so you can retrieve them instantly during an inspection.
- Set automated CP12 renewal reminders at 10 months, 6 weeks and 2 weeks before the annual anniversary to protect landlord clients from prosecution under the Gas Safety (Installation and Use) Regulations 1998.
- Use job notes or a custom field to record the appliance make, model and serial number on every boiler service so repeat visits are fully informed.
- Invoice on the day of completion rather than end of month. Gas engineers who invoice same-day are paid on average 9 days faster (Xero UK SME data, 2025).
- If you carry out more than roughly 30 boiler services per month, a dedicated job management app will save you at least 3 hours of admin per week compared with spreadsheets.
What gas engineers need from a job management app
Gas engineering sits in a different compliance category from most other trades. Every Gas Safe registered engineer in the UK is legally required to issue a Gas Safety Certificate (also called a Building Regulations Compliance Certificate) for notifiable installations such as a new boiler or gas hob. Landlords must hold a Landlord Gas Safety Record (LGSR, commonly called a CP12) for every tenanted property and renew it annually. Failure to comply carries a fine of up to £6,000 per breach under the Gas Safety (Installation and Use) Regulations 1998 and the Housing Act 2004.
A general-purpose job management app covers scheduling, invoicing and customer messaging. That is useful, but a gas engineer needs more. The ideal app will also track certificate issuance, flag upcoming CP12 renewals automatically, store appliance service histories, and allow the engineer to record Gas Safe registration numbers on each job record. Without these features, the compliance side of the business still falls back to paper files or spreadsheets, which creates risk and wastes time.
Beyond compliance, gas engineers in the UK tend to work across a mix of domestic reactive callouts (boiler breakdowns in winter in cities such as Manchester, Birmingham, Leeds and London), planned annual services, and landlord-portfolio contracts. Each type of work has different scheduling patterns and different billing arrangements. A good app handles all three without requiring separate spreadsheets or a second CRM.
Many gas engineers are sole traders or run small teams of two to five engineers. At that scale, affordability matters: a per-user monthly fee that suits a 50-person company can be disproportionately expensive for a one-man band. The apps reviewed below are evaluated on compliance features, scheduling, invoicing, customer communication, and value for sole traders and small teams.
For a wider view of software options across the full gas engineering workflow, see our companion guide: Best software for gas engineers UK 2026.
App comparison table
Prices shown are per month, billed monthly, as of August 2026. Annual billing typically reduces costs by 15 to 20 percent.
| App | Starting price | Gas Safe cert tracking | CP12 renewal reminders | Scheduling | Invoicing | Best for |
|---|---|---|---|---|---|---|
| Sleepless Tradesman | Free trial, then from £19/mo | Via custom job fields | Automated reminders | Full drag-and-drop calendar | Instant PDF invoicing | Sole traders and small teams |
| Commusoft | From £79/user/mo (est.) | Built-in compliance module | Yes, with service plans | Advanced route optimisation | Full accounts integration | Larger heating companies |
| Jobber | From £39/mo (Core plan) | Via custom fields only | Manual reminders only | Good calendar and dispatch | Online payments available | General field service businesses |
| Gas Engineer CRM | From £25/mo | Dedicated certificate log | Automated CP12 alerts | Basic scheduling | Basic invoicing | Compliance-first sole traders |
Prices correct as of August 2026. Always check the provider website for current pricing.
Sleepless Tradesman
Sleepless Tradesman is built specifically for UK tradespeople, which means it handles the realities of British gas engineering rather than adapting a US-market product to UK compliance requirements. The platform combines job scheduling, quoting, invoicing, customer communication and automated follow-ups in a single interface that works equally well on an iPhone in a customer airing cupboard and on a laptop in the office.
For gas engineers, the most relevant features are custom job fields (where you record Gas Safe certificate numbers, appliance make and model, serial number, and any fault codes), plus the automated reminder system. You can configure reminders to fire at set intervals before an annual service is due, which is exactly the workflow required for managing landlord CP12 records across a portfolio of properties. A landlord with 20 rental properties across Leeds or Manchester, for example, will have CP12 renewals scattered across different calendar months: Sleepless Tradesman surfaces them automatically rather than relying on you to check a spreadsheet.
Invoicing is instant: tap the job complete button and the PDF invoice is generated and sent to the customer in under 30 seconds. Quotes convert to jobs with a single tap, which matters when you are quoting a boiler replacement in someone's home and want to confirm the booking before you leave. The pricing starts with a free trial and then from approximately £19 per month for a sole trader, which is significantly lower than most competitors aimed at larger companies. For smaller gas engineering businesses, it is the most cost-effective option reviewed here.
The platform does not yet have a fully integrated Gas Safe certificate generation module in the way that specialist tools such as Gas Engineer CRM do. Certificate numbers are stored as job data rather than generated within the app. For most sole traders, this is sufficient because the actual certificate is issued through the Gas Safe Register portal or a separate document, and what matters is having the reference stored against the job record.
The app is also relevant if you are approaching or already operating above the Making Tax Digital for Income Tax Self Assessment (MTD ITSA) threshold. MTD ITSA applies from April 2026 for self-employed sole traders earning above £50,000 per year, from April 2027 above £30,000, and from April 2028 above £20,000. Sleepless Tradesman keeps income and job records in a format that integrates with MTD-compliant accounting software, reducing quarterly reporting friction.
Verdict: Best overall job management app for UK gas engineers who are sole traders or run teams of up to around 10 engineers. Excellent scheduling and invoicing, strong customer communication, competitive pricing.
Commusoft
Commusoft is a UK-built field service management platform with a long heritage in the heating and plumbing sector. It is used by many of the UK's larger domestic heating companies, boiler installation firms, and gas servicing businesses. Unlike the other apps reviewed here, Commusoft has a dedicated compliance module that covers Gas Safe certificates, service records, appliance histories, and landlord safety records as first-class features rather than workarounds using custom fields.
The service plan module is particularly powerful for businesses that manage annual service agreements. You can set up service plans for individual properties or for landlord portfolios, with automatic scheduling, renewal billing, and compliance document issuance handled through the platform. For a company servicing several hundred boilers per month across a city such as Birmingham or Sheffield, this automation represents a significant time saving.
Commusoft also integrates with Xero and Sage for accounts, and with supplier catalogues for parts pricing and stock management. The route optimisation feature helps dispatchers assign jobs geographically, which is relevant for companies covering large urban areas such as Greater London or Greater Manchester.
The main drawback is cost. Commusoft is priced for businesses with multiple engineers and multiple admin staff, and the per-user fee at the higher tiers makes it disproportionately expensive for a sole trader. If you are a one-person gas engineering business, you will likely be paying for functionality you never use. Commusoft also has a steeper learning curve than the other apps here: expect several weeks of setup and onboarding before the system is running smoothly.
Verdict: The strongest option on the market for larger UK heating companies that need deep compliance workflows and multi-engineer coordination. Too expensive and complex for most sole traders.
Jobber
Jobber is a well-known field service management app that originated in North America but has expanded its UK customer base substantially over the past three years. It is used across a wide range of trades including landscaping, cleaning, plumbing and HVAC, and more recently by gas engineers in the UK.
Jobber's strengths are its scheduling and dispatch tools, its customer-facing client hub (where customers can view quotes, approve jobs, and pay invoices online), and its polished mobile app. The quoting and invoicing workflow is smooth, and the online payment integration means customers can pay by card without the engineer needing a card reader on site.
For gas engineers specifically, Jobber has limitations. It does not have native Gas Safe certificate tracking, CP12 renewal reminders, or any compliance-specific fields built in. These can be replicated using custom fields and manual reminder scheduling, but the workaround requires discipline and is not as reliable as an automated system. Gas engineers who manage a significant proportion of landlord work will find the compliance gap a genuine problem.
Jobber starts at around £39 per month on the Core plan, which is reasonable for a sole trader, but the features most relevant to larger gas engineering businesses (route optimisation, multiple users, advanced reporting) are locked behind the Connect and Grow plans, which increase the monthly cost significantly.
Verdict: A solid general-purpose field service app with good scheduling and customer communication, but the lack of native Gas Safe and CP12 compliance features makes it a weaker choice than Sleepless Tradesman or Gas Engineer CRM for gas engineers specifically.
Gas Engineer CRM
Gas Engineer CRM is a specialist UK platform built for Gas Safe registered engineers. It focuses exclusively on gas engineering, which means the compliance features are more developed than in any general-purpose tool. The platform has a dedicated certificate log where Gas Safety Certificates are stored against each job and property, with CP12 renewal dates tracked automatically and customer reminders sent as the annual renewal approaches.
The appliance service history feature is particularly strong. Every boiler service, repair or inspection is logged against the property and the appliance, meaning that when a customer calls about a recurring fault, the engineer can review the complete history before arriving on site. For domestic heating engineers who service the same boilers year after year across areas such as suburban Leeds, Bristol or Edinburgh, this continuity of record-keeping is a real competitive advantage.
The trade-off is that Gas Engineer CRM is narrower in scope than the other apps reviewed here. The scheduling tools are more basic, the invoicing module lacks some of the polish of Sleepless Tradesman or Jobber, and there is no customer communication hub or automated follow-up sequence. If you need more than compliance and simple job tracking, you may find yourself supplementing Gas Engineer CRM with a separate invoicing tool such as FreeAgent or QuickBooks.
Pricing starts from around £25 per month, which is accessible for a sole trader. The platform is a strong choice if compliance is the primary concern and scheduling and invoicing are handled elsewhere.
Verdict: The most compliance-focused option for UK gas engineers. Best suited to engineers whose primary admin pain point is certificate tracking and CP12 renewals rather than scheduling or invoicing.
Verdict: which app should a UK gas engineer choose?
For the majority of UK gas engineers, particularly sole traders and small teams operating across domestic markets in cities including London, Manchester, Birmingham, Leeds, Sheffield, Edinburgh and Bristol, Sleepless Tradesman offers the best combination of scheduling, invoicing, customer communication and value. The custom fields and reminder system cover the core compliance workflow without the expense and complexity of a specialist platform.
If compliance is your single biggest admin problem and you manage a large number of landlord contracts with annual CP12 renewals, Gas Engineer CRM is worth evaluating alongside Sleepless Tradesman. The two tools address overlapping but slightly different needs.
Commusoft is the right answer for larger heating companies with multiple engineers, complex service plan portfolios, and the budget to match. Jobber is a capable general-purpose tool but is not optimised for the Gas Safe compliance requirements that distinguishes gas engineering from most other trades.
For related guidance on scheduling specifically, see our guide on the best scheduling app for gas engineers UK 2026, and for invoicing in detail, see the best invoicing app for gas engineers UK 2026.
Try Sleepless Tradesman free today
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Try Sleepless Tradesman freeFrequently asked questions
Does a job management app replace the Gas Safe Register portal for certificate issuance?
No. Gas Safe certificates for notifiable work must still be registered through the Gas Safe Register portal (gassaferegister.co.uk) or via your OFTEC-equivalent registration if applicable. A job management app stores the certificate number and relevant job data so you have a complete record, but it does not generate an officially recognised Gas Safety Certificate itself. Always complete the notification through the official channel.
How often must a landlord gas safety record (CP12) be renewed?
Under the Gas Safety (Installation and Use) Regulations 1998, a landlord must have all gas appliances in a rented property inspected and a new LGSR (CP12) issued at least every 12 months. The record must be given to existing tenants within 28 days of the check and to new tenants before they move in. Failure to comply is a criminal offence, so automated renewal reminders from a job management app are a practical safeguard for both the engineer and the landlord client.
What is the best free job management app for gas engineers in the UK?
Most capable job management apps for gas engineers offer a free trial rather than a permanently free tier, because the compliance and scheduling features require ongoing development and support. Sleepless Tradesman offers a free trial with no credit card required. For very basic record-keeping, a spreadsheet or a free tool such as Google Calendar may suffice, but neither offers CP12 renewal tracking or automated customer reminders, which means the compliance risk sits with the engineer.
Do I need a separate invoicing app if I use a job management app?
Not with most modern job management apps. Sleepless Tradesman, Commusoft and Jobber all include invoicing as a core feature, so you can raise and send invoices directly from the job record without switching to a separate tool. However, if you want full-featured accounts software with VAT returns, bank reconciliation, and self-assessment tax summaries, you may want to connect your job management app to a dedicated accounting package such as FreeAgent, QuickBooks, or Xero. Many apps offer direct integrations with these platforms.
What do gas engineers earn, and does an app help with pricing jobs correctly?
Gas engineer day rates in the UK vary significantly by region and experience. Sole traders typically charge between £250 and £500 per day in 2026, with London rates generally higher. For up-to-date benchmarking, see our guide on gas engineer hourly rate UK 2026. A job management app helps with pricing by giving you a clear view of time spent per job type, materials costs, and margin across your job history, so you can spot work that is being underpriced.