- 1. OVERVIEW
- 2. The key differences between Gas Engineer Software and Gas App Uk
- 3. Optimised for the business, not just the engineer
- 4. An organised system with addresses and contacts
- 5. Scalable for your business
- 6. FEATURE BY FEATURE
- 7. Built for the engineer, or built for the business
- 8. Switching to GES from Gas App Uk?
- 9. Start your free trial
- 10. Ask us to import your data
- 11. Quick & easy onboarding
- 12. IN DETAIL
- 13. Where GES helps on the business side
- 14. A job to hang everything off
- 15. Take the payment, then chase what's left
- 16. Your books, without the double entry
- 17. Someone to ring when you're stuck
- 18. GES is more than an app for engineers. It’s a system to help you run your heating business
- 19. How to know which one actually fits your business
- 20. You value the fault-finding forum
- 21. You want to run your business in one place
- 22. TRY GES FOR FREE
- 23. Try GES for free
- 24. Gas App UK vs Gas Engineer Software: FAQs
- 1. OVERVIEW
- 2. The key differences between Gas Engineer Software and Gas App Uk
- 3. Optimised for the business, not just the engineer
- 4. An organised system with addresses and contacts
- 5. Scalable for your business
- 6. FEATURE BY FEATURE
- 7. Built for the engineer, or built for the business
- 8. Switching to GES from Gas App Uk?
- 9. Start your free trial
- 10. Ask us to import your data
- 11. Quick & easy onboarding
- 12. IN DETAIL
- 13. Where GES helps on the business side
- 14. A job to hang everything off
- 15. Take the payment, then chase what's left
- 16. Your books, without the double entry
- 17. Someone to ring when you're stuck
- 18. GES is more than an app for engineers. It’s a system to help you run your heating business
- 19. How to know which one actually fits your business
- 20. You value the fault-finding forum
- 21. You want to run your business in one place
- 22. TRY GES FOR FREE
- 23. Try GES for free
- 24. Gas App UK vs Gas Engineer Software: FAQs
SOFTWARE FOR UK GAS ENGINEERS
Gas App Uk vs
Gas Engineer Software (GES)
Gas App Uk is a reference and paperwork app built for the individual engineer: Digital forms, boiler manuals, an in-app forum, calculators, and a diary.
Gas Engineer Software, or GES, runs the entire business around that work. As a full job management system, the difference shows up the moment you finish the job and start chasing money, working with agents, and taking people on.
Note: Gas App Uk and Gas Engineer Software are two separate software products/brands, not two descriptions of the same thing.
OVERVIEW
The key differences between Gas Engineer Software and Gas App Uk
-
1
Optimised for the business, not just the engineer
Gas App Uk’s web portal gets you to the app on a bigger screen. While it has digital forms, customers, and a calendar, there is no core job management flow.
GES gives you a end-to-end system for running your business. The web portal has a company dashboard and reporting, jobs with custom statuses, quote statuses from pending through to accepted, and invoices marked paid, outstanding, overdue or reconciled.
-
2
An organised system with addresses and contacts
Gas App Uk saves customers, and that’s the whole structure. There’s no job address underneath, so a landlord or agent with multiple properties has several 'contacts' in your system.
GES keeps job addresses against the customer, as many as they have, with the landlord or agent on the address itself. Jobs sit under both, so you get a full history for the customer and for the property.
-
3
Scalable for your business
Gas App Uk Premium covers two users. Any more is a written request they have to approve. GES is priced per user, so you can scale your business up and down whenever needed.
The calendar is built for a team too: week, month and per-engineer views, with desktop scheduling that suits office staff booking the work as well as engineers out doing it.
FEATURE BY FEATURE
Built for the engineer, or built for the business
Where Gas App Uk and GES line up (as of September 2026).
| Features | Gas App UK | Gas Engineer Software (GES) |
|---|---|---|
| On the tools | ||
| Heating & plumbing certificates | ||
| Heat pump certificates | ||
| Flue gas analyser integration | ||
| Boiler manuals in the app | ||
| AI assistant | Boiler Bot — fault diagnostics | Boiler AI Assist — manuals |
| Gas rate calculator | ||
| Pipe sizing Calculator | ||
| Installation volume calculator | ||
| Ventilation calculator | ||
| Tightness test helperInside the installation volume calculator | ||
| In-app support | Phone, WhatsApp, or live chat to a real human, 9am-5pm Mon-Fri | |
| Fault-finding forum | ||
| Admin & office | ||
| Job management flow | ||
| Saved customers | ||
| Full customer, address, and job history | ||
| Job address held separately from the customer | Saved customers only | |
| Landlord or agent against the property | Typed in, or a separate contact | |
| Calendar & diary | Basic calendar with events | Fully integrated scheduling with engineer views & more |
| Web portal for office use | Accessible, but no additional web features | Company dashboard, reporting, optimised for office use |
| Website builder | ||
| Custom job statuses | ||
| Quotes & invoices | ||
| Automated quote reminders | ||
| Invoice payment reminders | Up to 3, stop when paid | |
| Quote statuses | Pending, Accepted, Declined, Expired, Cancelled. | |
| Invoice statuses | Paid or unpaid only | Paid, outstanding, reconciled, overdue |
| Take payment on site | Crezco, £1 flat | |
| AI quoting & invoicing | ||
| Accounting integrations | Export only; Xero & QuickBooks | Xero, QuickBooks & Sage |
| Reminders | ||
| Service reminder when a certificate is issued | ||
| Reminders by SMS as well as email | Email only | |
| Service reminder reports | ||
| Business remindersManual reminders for MOTs, training, etc. | ||
| Team, cost & your data | ||
| Users included | 2 | Priced per user |
| Adding more users | Written request, subject to approval | Do it yourself, any time |
| Free tier | Manuals, with adverts | |
| Free 14-day trial | ||
| Price | £14.99Per month, up to 2 users | £18–£31Per user, per month |
| Try GES today: Start free trial |
Compiled from gasapp.co.uk, the Gas App UK app store listings and the app itself, September 2026. Gas App UK prices are for the Premium plan, which covers up to two users. Both products change, so check before you decide.
Switching to GES from Gas App Uk?
We can help you import all your data and get started without hassle. Just let us know as you sign up and we’ll get you sorted.
Start your free trial
Sign up in minutes and get full access for 14 days — no card, no commitment.
Ask us to import your data
Send us your customers, addresses, and service dates and we’ll bring it all across for you in one go.
Quick & easy onboarding
There's no need for a complex onboarding and setup process. If you need help, our UK support team is always available to help.
Get your first 14 days free:
IN DETAIL
Where GES helps on the business side
Gas App Uk is a useful tool for the engineer out in the field. Digital records, in-app calculators, and the fault-finding forum are all useful features. GES provides all of the above aside from the in-app forum, but provides a fully built-out job management system to run your business.
GES is more than an app for engineers. It’s a system to help you 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.
How to know which one actually fits your business
You value the fault-finding forum
- The fault-finding community is worth the subscription on its own
- You mainly want the app for digital paperwork
- You do your admin work on paper/manually
- A free website and a cheaper insurance rate thrown in matter to you
- £14.99 a month flat is the number that decides it
You want to run your business in one place
- You want an easier way of staying on top of jobs & paperwork
- You want an easy way to take payments on the job
- You work with landlords/agents with multiple properties
- You want to sync invoices/customers/payments to your accounting software
- You want to sync invoices/customers/payments to your accounting software
TRY GES FOR FREE
Try GES for free
Try GES, create certificates, and more in a 14-day free trial. Learn more about switching to GES.
- Try every feature during your trial
- Ask us to import your customers
- Free onboarding call included
- No credit card required
Gas App UK vs Gas Engineer Software: FAQs
Anything we haven't covered? Talk to our team.
Are Gas Engineer Software and Gas App UK product names, or types of software?
Both are brand names, and this page compares those two specific products rather than two categories of software.
Gas Engineer Software (also called GES, at gasengineersoftware.co.uk) is a job management platform for UK heating and plumbing businesses — certificates, jobs, scheduling, quotes, invoices, payments and reminders.
Gas App UK (at gasapp.co.uk) is a reference and paperwork app for gas engineers — boiler manuals, a fault-finding forum, calculators, digital forms and a diary.
Neither name is a generic term for software used by the gas trade.
What is the main difference between Gas App UK and Gas Engineer Software?
Who they're built for. Gas App UK is built for the engineer — a huge manual library, a fault-finding community, calculators, forms, a diary and basic invoicing, all on one subscription. It's very good at that.
Gas Engineer Software is also built to run the business around that work: chasing quotes and invoices, taking payment, holding properties and landlords separately from customers, and adding engineers as you grow.
Does Gas App UK do gas certificates?
Yes. Domestic job sheets, gas inspection records, landlord gas safety records, warning notices, Legionella risk assessments, and commercial and oil forms, with auto-fill and your logo on them.
Certificates aren't where these two differ. It's what happens around them — full job management workflows, stored job addresses, quote and invoice reminders, and more.
Do both send service reminders?
Both send a service reminder off the back of a completed certificate, so on the headline feature it's a draw.
Two differences worth knowing: GES can send by SMS as well as email, and GES also chases quotes and unpaid invoices automatically.
Can I use both?
If the fault finding forum is something you value, using both apps can work.
However, GES offers almost everything else Gas App Uk has in a single, scalable package.
Do you need a card to try GES?
No. GES offers a 14-day free trial with every feature, and no card details are required. You can sign up and issue a real gas safety record on your next job without speaking to anyone.