- 1. OVERVIEW
- 2. What separates the two?
- 3. A deeper invoicing toolkit
- 4. An AI boiler assistant on the tools
- 5. Built to grow with you
- 6. FEATURE COMPARISON
- 7. The full picture, side by side
- 8. GES is more than a tool. It’s a proven way to run your heating business
- 9. KEY DIFFERENCES
- 10. Where GES goes further as the heating business platform
- 11. AI boiler assistant
- 12. Better invoicing
- 13. On-site payments
- 14. Saved appliance details
- 15. TRY GES FOR FREE
- 16. Start your 14-day free trial
- 1. OVERVIEW
- 2. What separates the two?
- 3. A deeper invoicing toolkit
- 4. An AI boiler assistant on the tools
- 5. Built to grow with you
- 6. FEATURE COMPARISON
- 7. The full picture, side by side
- 8. GES is more than a tool. It’s a proven way to run your heating business
- 9. KEY DIFFERENCES
- 10. Where GES goes further as the heating business platform
- 11. AI boiler assistant
- 12. Better invoicing
- 13. On-site payments
- 14. Saved appliance details
- 15. TRY GES FOR FREE
- 16. Start your 14-day free trial
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. While one focuses on handling paperwork, the other is a platform that helps heating businesses run their entire day and keep diaries full.
OVERVIEW
What separates the two?
- 1
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.
- 2
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.
- 3
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 how Gas Engineer Software adds more. (As of July 2026).
| 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 | ||
| Estimates, quotes & invoices | No CIS support | Supports CIS |
| Instant quote to invoice conversion | ||
| Payment reminders | ||
| 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 | ||
| In-app pipe sizing | ||
| Scheduling & calendar | ||
| Job management | ||
| 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."
GES is more than a tool. 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
Save hours & fill your diary with repeat work from reminders.
KEY DIFFERENCES
Where GES goes further as the heating business platform
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