Gas Engineer Software review (UK, 2026)

Gas Engineer Software, usually shortened to GES, is a UK app built for gas, oil and heating engineers. It handles CP12s, service records and reminders alongside jobs, quotes and invoices. We compared its pricing page, published features and user reviews on 12 October 2026.

Who should buy Gas Engineer Software, and who should not?

Gas Engineer Software key facts

What does Gas Engineer Software do well?

Certificates on the cheapest plan

Many general trade apps keep certificates for a higher tier. Tradify puts them on Pro (£37 per user) and Powered Now on Professional (£32 per user ex VAT). GES includes records and certificates on Starter, from £18 per user per month ex VAT on an annual plan.

Built around gas work

Gas rate calculations, pipe sizing and other tools work offline and feed straight into the certificate. Boiler manuals come with an "AI Assist" search. Customer, property and appliance history sits in one record, so next year's service is quick to book.

Service reminders that bring work back

Automated service reminders can turn into booked jobs, and payment reminders chase late payers. GES gives an example of 120 reminders, a 33% conversion and £78 a booking producing £3,089 a year in extra revenue. That is the vendor's own illustration, but the logic holds: repeat annual services are the easiest work a gas engineer can win.

Well-rated engineer app

The UK App Store showed 4.7 from 1.5k ratings when we checked, a large sample for a niche trade app.

No contract, no setup fee

Billing is month to month and you keep access to the end of the period if you cancel.

Where does Gas Engineer Software fall short?

• Confusing Core price. The FAQ says £23 per user, but the price calculator shows £25 per user (4 users for £100). Confirm the figure before you subscribe.
• Accounting links only on Pro. Xero, QuickBooks and Sage need the £30 plan.
• Gas and heating focus. If you also do electrical work and EICRs, a general trade app like Tradify or Powered Now fits better.
• Thin independent reviews outside the App Store. Trustpilot UK showed 4.5 from just 14 reviews, and Capterra UK had no user reviews when we checked.
• Some forms not named. The pricing page lists the main records, but warning notices and commissioning checklists were not named there. GES says it covers "every UK gas and oil certificate", so ask for the full list in your trial.
• App Store pricing differs. The App Store lists an in-app "Single Engineer, 12 Months Subscription" at £19.00, which does not match the web pricing. Check what you are buying before paying through Apple.

How much does Gas Engineer Software cost?

Here is what GES's pricing page shows. All prices exclude VAT.

Worked examples

A sole engineer on Starter pays £216 a year on the annual plan (£18 times 12), or £228 paying monthly (£19 times 12), both plus VAT. Gas Certificate App, a certificates-only rival, charges £20 per user per month or £216 per user per year ex VAT on its own site.

Gas Engineer Software features in detail

Gas safety records

GES produces the landlord gas safety record (often called a CP12), boiler service records and gas tightness test records, with your logo on each one. Certificates are emailed to customers from the app. HSE says landlords must arrange an annual gas safety check, can have it done up to 2 months early while keeping the same due date, and must keep records for at least 2 years. HSE also accepts digital records if they can be printed, are secure and identify the engineer. Our landlord gas safety certificate guide sets out the full rules.

Oil and heat pump certificates

Oil records and certificates, and heat pump certificates, are listed. That helps engineers who are adding heat pump work as boiler installs slow down.

Service reminders

Reminders go out automatically before the next service or landlord check is due, and replies can become booked jobs. The full service history per property and appliance means you can see what was fitted and when.

Job management

From Core, you get scheduling, quotes, invoices and automated reminders. Team scheduling with permissions, custom job statuses and QR-code payments on invoices are also listed. GES's homepage lists Making Tax Digital support. If MTD matters to you, check that GES appears on HMRC's list of compatible software before you rely on it.

Apps and offline use

Engineers use the mobile app on iPhone, iPad (iOS 15 or later) or Android. Calculators and tools work offline. The office uses a web portal.

What do users say about Gas Engineer Software?

These are third-party scores, not our own rating. We do not average them.

All 14 Trustpilot reviews were 5-star, praising ease of use, less paperwork, the all-in-one set-up and helpful support. Trustpilot noted that GES had not recently invited customers to review, so treat that small sample with care. The App Store score from 1.5k ratings is the more reliable signal.

Gas Engineer Software pros and cons

Who is Gas Engineer Software best for?

For a wider look at software for boiler and heating firms, see our heating engineer software guide.

What are the best alternatives to Gas Engineer Software?