Best App for Gas Engineers UK 2026: CP12 Certificates, Gas Safe Records and New Leads Compared
Gas engineers carry more legal responsibility per job than almost any other trade. Every gas appliance installation or service generates a certificate. Every landlord property needs an annual CP12. Miss a record or send a non-compliant certificate and the consequences go beyond a dispute — Gas Safe registration is on the line. The right app handles compliance paperwork automatically, so you can focus on the job.
Here are the 5 best options for UK gas engineers in 2026.
What Gas Engineers Need from an App
- CP12 landlord gas safety certificate generation
- Boiler service records per property
- 12-month service reminder automation
- Gas Safe registration number on documents
- Digital signature capture
- VAT invoicing
- CIS invoice format
- Quoting tool
- New customer leads (boiler services, repairs)
5 Best Apps for Gas Engineers UK (Comparison Table)
| App | Monthly Cost | Free Plan | CP12 Certs | Service Reminders | Quoting | Customer Leads |
|---|---|---|---|---|---|---|
| Commusoft | £45–150/mo | No | Yes (dedicated) | Yes (automated) | Yes | No |
| Powered Now | £19–89/mo | No | Yes (templates) | Basic | Yes | No |
| Sleepless Tradesman | Free + Pro | Yes | Basic storage | No | Yes (AI-powered) | Yes (marketplace) |
| ServiceM8 | £9–89/mo | No | Custom forms | No | Yes | No |
| Gas Safety App (Gas Safe Register) | Free | Yes | Yes (CP12 only) | No | No | No |
1. Commusoft
The most complete platform for gas and plumbing engineers. Commusoft is purpose-built for compliance certificate management — CP12 records, boiler service history per property, 12-month automated landlord reminders and asset tracking (appliance model, install date, warranty). It also includes advanced scheduling, invoicing and a full customer CRM.
Best for: Gas engineers managing 20+ landlord properties who need an automated compliance workflow.
Weakness: £45–150/month is expensive for a sole trader with light compliance needs.
2. Powered Now
UK-built for gas and plumbing trades. Powered Now includes gas safety certificate templates (CP12 and others), job sheets, quotes and invoices. Engineers complete certificates on site on mobile and email them directly to landlords. Gas Safe registration number auto-populates on all documents. Priced at £19–89/month.
Best for: Sole trader gas engineers wanting gas cert templates without Commusoft's price tag.
Weakness: Smaller feature set than Commusoft, basic scheduling only.
3. Sleepless Tradesman
Free tier with AI-powered quoting, invoicing and card payment collection. The homeowner marketplace makes gas engineers discoverable for boiler services, breakdowns and landlord gas checks. VAT and CIS invoice support is included, along with basic document storage.
Best for: Gas engineers wanting new boiler service leads and a free invoicing tool.
Weakness: Not specialist for CP12 generation — use alongside Powered Now or the Gas Safety App for compliance documents.
4. ServiceM8
Per-job pricing (£9–89/month). Advanced scheduling with GPS tracking — useful for engineers covering wide service areas. The custom form builder can replicate CP12 format, giving gas businesses flexibility.
Best for: Gas businesses with multiple engineers needing GPS dispatch and real-time job status.
Weakness: CP12 forms require manual setup, no automated service reminders.
5. Gas Safety App (Gas Safe Register)
Free dedicated app for CP12 management only. Issued and backed by Gas Safe Register. Engineers create, sign and issue CP12 certificates on mobile directly from the app.
Best for: Gas engineers who want compliant CP12 management for free and use separate tools for everything else.
Weakness: Certificates only — no quoting, invoicing, scheduling or leads.
The Recommended Stack for Gas Engineers
No single app covers every need a gas engineer has. The right combination depends on your volume of landlord work, team size and budget. Here are the recommended stacks by scenario:
- High landlord portfolio (20+ properties): Commusoft for compliance + Sleepless Tradesman for leads
- Sole trader, moderate gas work: Powered Now for certs + Sleepless Tradesman free for quoting and leads
- Multi-van gas business: ServiceM8 for dispatch + Gas Safety App or Commusoft for certs
- Starting out, minimal budget: Gas Safety App (free CP12) + Sleepless Tradesman free tier
Gas Safe Compliance: What Your Records Must Include
- Gas Safe registered engineer name and registration number
- Date of inspection or service
- Property address
- Description of each appliance tested
- Test results (including flue gas analysis readings)
- Any defects found and action taken
- Customer or landlord signature
- Engineer signature
Frequently Asked Questions
What is the best app for gas engineers in the UK?
For gas engineers who need CP12 landlord gas safety record management and boiler service history, Commusoft (from £45/month) is the most feature-complete option. For sole trader gas engineers wanting a simpler, cheaper alternative with gas cert templates, Powered Now (from £19/month) is purpose-built for UK gas and plumbing trades. Sleepless Tradesman complements both with its free-tier quoting and invoicing plus a homeowner marketplace to generate new boiler service and repair leads.
Can apps generate CP12 landlord gas safety certificates?
Yes — Commusoft and Powered Now both support CP12 landlord gas safety certificate generation and storage. Commusoft stores the full gas appliance record per property with service history and automatic 12-month reminder. Powered Now has certificate templates you complete on site and email directly to landlords. ServiceM8 allows custom form creation that can replicate CP12 format. The Gas Safety app by Gas Safe Register is a free dedicated option for CP12 management only.
How do gas engineers handle CIS if working as a subcontractor?
Gas engineers working as CIS subcontractors for plumbing or heating companies must register with HMRC under CIS, provide their UTR number, and receive payment with a 20% deduction (or 30% if unverified). Your invoices must show the labour/materials split clearly so the contractor deducts CIS from labour only. Sleepless Tradesman supports CIS invoice formats. At tax year end, claim back any over-deducted CIS on your Self Assessment return.