TOC

GAS CERT APP COMPARISON

Gas Certificate App vs
Gas Engineer Software

Two very popular options for UK gas engineers when it comes to issuing gas certificates and managing jobs, but which offers the better value for your money? See what features set them apart below, or get started with a free 14-day GES trial:

OVERVIEW

What separates the two?

A deeper invoicing toolkit

Getting paid is one of Gas Engineer Software’s strong points. Take easy on-site payments for just £1 an invoice no matter the size, and automatically chase late payers with invoice reminders.

At the same time, GES offers increased flexibility with a Sage integration alongside Xero and QuickBooks.

An AI boiler assistant on the tools

GES has an AI assistant built on a library of thousands of boiler manuals.

Ask it about a model and get what you need (manual details, settings, and specs) in seconds on the job, instead of flicking through PDFs or ringing the office.

Built to grow with you

Gas Engineer Software is designed to grow with your business, with best-in-class scheduling and job management tailored to heating and plumbing teams.

If you ever need help, an expert UK-based support team is on stand-by Monday-Friday, 9-5.

A deeper invoicing toolkit

Getting paid is one of Gas Engineer Software’s strong points. Take easy on-site payments for just £1 an invoice no matter the size, and automatically chase late payers with invoice reminders.

At the same time, GES offers increased flexibility with a Sage integration alongside Xero and QuickBooks.

An AI boiler assistant on the tools

GES has an AI assistant built on a library of thousands of boiler manuals.

Ask it about a model and get what you need (manual details, settings, and specs) in seconds on the job, instead of flicking through PDFs or ringing the office.

Built to grow with you

Gas Engineer Software is designed to grow with your business, with best-in-class scheduling and job management tailored to heating and plumbing teams.

If you ever need help, an expert UK-based support team is on stand-by Monday-Friday, 9-5.

FEATURE COMPARISON

The full picture, side by side

Where the two line up, and the handful of places Gas Engineer Software adds more.

Features Gas Certificate App GES
Mobile & web appsPhone, tablet & desktop
Built for gas & heating engineers
Gas, oil & industry certificatesCP12, LGSR, warning notices & more
Saved appliance details
UK customer support
Boiler manuals in app
AI Boiler assistant
Sage integration
QuickBooks integration
Xero integration
Take payments on site
Job sheets
Digital signature capture
Add your logo to documents
Works offline
Flue gas analyser integration
Testo & TPI

Kane, Anton, & TPI
In-app gas rate calculator
Scheduling & calendar
Job management
Estimates, quotes & invoices
No CIS support

Supports CIS invoicing
Payment reminders
Customer management (CRM)
Automated service reminders
Team & user management
Free trial (no card required) 14 days 14 days
Pricing £20 per user £18 - £30 per user
Try GES today: Start free trial

"Gas Engineer Software is a great fit. For the price range, you'd have to be psychotic to say no — it's such great value for money."

Edward Lovell KM Plumbing and Heating · Gloucester

GES is more than software. It’s a proven way to run your heating business

Easy to use & set up

It takes minutes to set up & learn Gas Engineer Software.

Grows with your business

Add users as you grow, and manage teams effectively. 

Reliable & proven system

There’s no point having to enter in the same thing every cert, right?

KEY DIFFERENCES

Where Gas Engineer Software goes further

Saved appliance details

Log a boiler once and Gas Engineer Software remembers it. Next time you're back at that property, the make, model and location are already there.

  • Make, model & location stored
  • Pre-filled on every return visit
  • Fewer typos, faster certificates
Saved automatically and ready the next time you visit.

AI boiler assistant

Stuck on an unfamiliar boiler? The GES AI assistant is built on a library of thousands of manuals, so the answer's never far away.

  • Ask about any model in plain English
  • Manual details, settings & specs
  • Answers in seconds, on the job
Gas Certificate App's manual library has no AI assist.

Deeper invoicing

Everything you'd expect from invoicing, then a bit more — built to keep your books tidy and your cash flowing.

  • Syncs with Sage, Xero & QuickBooks
  • Automatic reminders chase late payers
  • Turn a quote into an invoice in one click
Gas Certificate App connects to Xero & QuickBooks only — no Sage.

On-site payments

Don't leave the job with an invoice still to chase. Take the payment before you've packed the van away.

  • Payment links & QR codes via Crezco
  • Flat £1 fee — not a percentage
  • Money in the bank, not on a reminder
Gas Certificate App has no built-in way to take payment.

TRY GES FOR FREE

Start your 14-day free trial

Try GES, create certificates, and more in a 14-day free trial

  • Unlimited certificates during trial
  • Try every feature
  • Free onboarding call included
  • No credit card required