- 1. Gas certificate software
- 2. How the GES gas certificate app works
- 3. Choose a certificate
- 4. Fill the certificate as you work
- 5. Sign. Approve. Send.
- 6. SAVE HOURS EACH WEEK
- 7. Get your paperwork done before you pack up
- 8. PROFESSIONAL GAS CERTIFICATES
- 9. Send certs that match the quality of your work
- 10. SIMPLE & ORGANISED
- 11. Keep all your records safe, organised, and searchable
- 12. TRY GES FOR FREE
- 13. Start your 14-day free trial
- 14. Every certificate, in one gas certificate app
- 15. GES is more than just a gas certificate app
- 16. WIN MORE JOBS
- 17. Quotes & Estimates
- 18. GO PAPERLESS
- 19. Records & Certificates
- 20. GET PAID FASTER
- 21. Invoices & Payments
- 22. 2,300+ MANUALS
- 23. Boiler Manuals & AI Assist
- 24. CONNECT YOUR APPS
- 25. Integrations
- 26. STAY ORGANISED
- 27. Scheduling & Calendar
- 28. GET REPEAT BUSINESS
- 29. Automated Reminders
- 30. STREAMLINE WORK
- 31. Job Management
- 32. CRM SOFTWARE
- 33. Customer Management
- 34. EASY ACCESS CONTROL
- 35. User Management
- 36. LOOK PROFESSIONAL
- 37. Custom Workflows
- 38. Frequently asked questions
- 39. Make your job easier withGas Engineer Software
- 1. Gas certificate software
- 2. How the GES gas certificate app works
- 3. Choose a certificate
- 4. Fill the certificate as you work
- 5. Sign. Approve. Send.
- 6. SAVE HOURS EACH WEEK
- 7. Get your paperwork done before you pack up
- 8. PROFESSIONAL GAS CERTIFICATES
- 9. Send certs that match the quality of your work
- 10. SIMPLE & ORGANISED
- 11. Keep all your records safe, organised, and searchable
- 12. TRY GES FOR FREE
- 13. Start your 14-day free trial
- 14. Every certificate, in one gas certificate app
- 15. GES is more than just a gas certificate app
- 16. WIN MORE JOBS
- 17. Quotes & Estimates
- 18. GO PAPERLESS
- 19. Records & Certificates
- 20. GET PAID FASTER
- 21. Invoices & Payments
- 22. 2,300+ MANUALS
- 23. Boiler Manuals & AI Assist
- 24. CONNECT YOUR APPS
- 25. Integrations
- 26. STAY ORGANISED
- 27. Scheduling & Calendar
- 28. GET REPEAT BUSINESS
- 29. Automated Reminders
- 30. STREAMLINE WORK
- 31. Job Management
- 32. CRM SOFTWARE
- 33. Customer Management
- 34. EASY ACCESS CONTROL
- 35. User Management
- 36. LOOK PROFESSIONAL
- 37. Custom Workflows
- 38. Frequently asked questions
- 39. Make your job easier withGas Engineer Software
Gas certificate software
Issue professional gas certificates from your phone
Save hours on paperwork, create professional gas certificates, and never forget another boiler service reminder with GES — the industry’s best gas certificate app. Works fully offline.
How the GES gas certificate app works
Save time and effort with digital gas certs. GES is the industry’s best gas certificate app — create all your Gas Safe Register certificates and run your business from your phone.
Favourites
Choose a certificate
The certs you issue most live one tap away. Customer details, boiler model, and your own information are pre-filled.
Searching for Devices
Fill the certificate as you work
You can even connect to your Kane, TPI, or Anton analyser to pull results straight in the certificate.
Sign. Approve. Send.
Get your customer's signature on your phone, tap approve, and they'll receive the cert via email while it gets saved to your records.
"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."
SAVE HOURS EACH WEEK
Get your paperwork done before you pack up
Pre-filled details
GES inputs addresses, names, and appliance details on every record. You can also scan serial numbers and import FGA readings with a dated report to keep you legally covered.
See how connecting your analyser to GES works →
Works fully offline
Work at remote properties? Gas Engineer Software saves offline drafts that auto-sync when back online.
Built-in gas rate calculator
GES comes with a built-in gas rate calculator. Use it while completing certificates and the software will calcuate & copy across the results for you.
Automatic boiler service reminders
The moment you issue a relevant certificate, GES schedules in a boiler service reminder for your customer.
PROFESSIONAL GAS CERTIFICATES
Send certs that match the quality of your work
Headed certificates with your logo
Add your logo to GES and it'll appear on every certificate you create, along with your brand name and contact details.
Learn more about Customisations →
Add photos to jobs
Upload photos taken with your phone to any record you create. Choose whether you want it for reference or would like to send it to your customer.
Convenient digital copies
Customers and letting agents don’t want the bother of paper records. A digital cert takes seconds to share, won’t be lost, and can always be printed or re-sent.
Show your professionalism
Handwritten, rips, creases, and flimsy carbon copies don't reflect the quality of your work.
SIMPLE & ORGANISED
Keep all your records safe, organised, and searchable
Keep your records organised
Every certificate, invoice, and job you create on Gas Engineer Software is linked to a customer, job, and job address.
Find what you need in seconds
Search by customer name, address, or cert type to find old records in seconds.
Automatic backups
All your records are regularly backed up and kept safe in GES.
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
TRUSTED BY 7,000+ UK HEATING BUSINESSES
★★★★★
Based on 1500+ reviews
LIST OF CERTIFICATES
Every certificate, in one gas certificate app
Below is a complete list of all the gas and oil certificates we currently provide for heating & plumbing companies. Our certificates are Gas Safe Register compliant and can be used for any job.
Domestic Gas 6 types
- Homeowner Gas Safety Certificate
- Landlord Gas Safety Certificate
- Gas Warning Notice
- Gas Service Record
- Gas Breakdown Record
- Installation / Commissioning Checklist
Non-Domestic Gas 5 types
- ND Gas Safety Record
- Leisure Industry Gas Safety Record
- LPG Gas Safety Record
- ND Gas Testing & Purging Record
- ND Catering Record
Oil & Miscellaneous 8 types
- CD/10
- CD/11
- CD/12
- CD/14
- TI/133D
- Legionella Risk Assessment
- Minor Electrical Works Record
- Unvented Hot Water Cylinder
ALL FEATURES
GES is more than just a gas certificate app
See how you can save time with our all-in-one software for heating & plumbing businesses:
WIN MORE JOBS
Quotes & Estimates
Create winning quotes in minutes with template line items. Then, convert them to invoices in one click.
GO PAPERLESS
Records & Certificates
All gas industry certificates. In your pocket, for every job.
GET PAID FASTER
Invoices & Payments
Convert quotesto invoices. Complete with easy & low-fee digital payments.
2,300+ MANUALS
Boiler Manuals & AI Assist
Get any information you need about a boiler in seconds with the GES app.
CONNECT YOUR APPS
Integrations
Save time by sending data to your accounting software and connecting to your analyser.
STAY ORGANISED
Scheduling & Calendar
Manage your jobs & team in one place.
GET REPEAT BUSINESS
Automated Reminders
Send service reminders & chase late payers — without lifting a finger.
STREAMLINE WORK
Job Management
Keep everything together with an activity history for all customers.
CRM SOFTWARE
Customer Management
Keep all of your customer details tidy & in one place.
EASY ACCESS CONTROL
User Management
Give users access to what they need.
LOOK PROFESSIONAL
Custom Workflows
Add your logo to your records, create custom job statuses, and more.
Frequently asked questions
Got a question we haven't covered? Talk to our team.
Are GES certificates legally valid?
Yes. GES certificates are fully compliant with Gas Safe and HSE requirements, and are accepted by letting agents, councils, and insurers across the UK.
What if I lose signal on-site?
GES works fully offline. Drafts auto-save to your device and sync the moment you're back online — nothing gets lost.
Can I switch from another cert app?
Yes. Our team can import your customer database and help you set up your account during onboarding — included free with your subscription.
How long are my records kept?
Indefinitely, for as long as you're a customer. Every certificate you've ever issued stays searchable and exportable as a PDF.
What if my engineer's not tech-savvy?
If they can use WhatsApp, they can use GES. We also run a free 20-minute onboarding call with every new team so everyone's up and running on day one.
Is there a contract or notice period?
No. Monthly billing, cancel anytime, no notice required. Annual plans come with a discount but aren't compulsory — and if you leave, you can export every record you've created.
Paul Laborevics
York Heating and Plumbing Solutions
"The customer service is spot on. Time-saving software that helps keep me on track.
Very happy and satisfied."
Phil Shakespeare
Premium Heating Services Ltd
"Brilliant app. I’ve been using it for 3 months and it’s so easy to use for everything from certificates to service reminders and invoicing."
Brett Carey Carey Plumbing & Heating
"From gas records to quotes, estimates, and invoices, it’s saved us so much time and money. I can’t recommend this more."
Make your job easier with
Gas Engineer Software
Efficient quoting, scheduling & certificates. All in one place.
GES helps you manage your heating & plumbing business and save hours each week on admin and paperwork.