Gas Engineer Software - GES: iPhone vs Android

Run your heating & plumbing business in one place and keep the diary full.

Gas Engineer Software (GES) is the complete job management system built specifically for UK heating and plumbing businesses. Certificates, jobs, quotes, invoices, payments, on-site tools and automatic service reminders: One app, for every job, on your phone or back at the office.

More than 7,000 UK businesses trust GES to run their jobs, backed by 14 years in the market.

More than a basic gas certificate app, GES is a full system that runs the business issuing them, then turns this year's certificate into next year's booked work.

GROW YOUR BUSINESS
• Automatic service reminders keep loyal customers coming back year after year and book the repeat work for you
• Businesses on GES see an average 37% revenue increase in their first year
• Get paid faster with QR codes and payment links included with your invoices (powered by Crezco), with automatic chasing for late payers

LOSE THE PAPERWORK
• Quickly generate estimates, quotes, and invoices with templates or an AI draft, complete with statuses and payment tracking
• Convert accepted quotes into invoices in one tap
• UK gas, oil, and heat pump certificates, signed on-site and sent
• Send appointment confirmations to customers in one click
• Generate customer statements in seconds
• GES saves each person on the team 6.6+ hours a week

BUILT FOR HEATING & PLUMBING
• The entire GES workflow is designed around heating & plumbing jobs, not bolted onto a generic trades system
• Manage your jobs, your diary, and your team in one place. GES works perfectly for sole traders and larger operations that need to connect office staff with engineers
• Sync payments, customers, and invoices to Xero, QuickBooks, or Sage
• Pull readings from your Anton, Kane or TPI flue gas analyser straight into a certificate
• Reference 2,300+ boiler manual PDFs in the app, along with AI Assist to get the answers you need faster
• In-app calculators for gas rating, pipe sizing, installation volume, and tightness testing
• UK-built, with UK support that actually knows heating via phone, chat, and email
• Full offline access on the mobile apps, syncing when next online

TRUSTED WITH WHAT MATTERS
Your business data, certificates and property records are important, and the engine of your repeat work. GES has 14 years of experience keeping everything safe & adhering to data security best practices.

EVERY CERTIFICATE, BUILT IN
Gas: Homeowner Gas Safety Record · Landlord Gas Safety Record (CP12) · Gas Warning Notice · Gas Service Record · Gas Breakdown Record · Installation & Commissioning Checklist · Non-Domestic Gas Safety Record · Leisure Industry Gas Safety Record · LPG Gas Safety Record · Non-Domestic Testing & Purging Record · Non-Domestic Catering Record.
Oil: CD/10 Installation Completion · CD/11 Servicing & Commissioning · CD/12 Landlord Oil Installation Check · CD/14 Oil Warning & Advice Notice · TI/133D Oil Storage & Tank Risk Report.
Other: Air

Run your heating & plumbing business in one place and keep the diary full.

Gas Engineer Software (GES) is the complete job management system built specifically for UK heating and plumbing businesses. Certificates, jobs, quotes, invoices, payments, on-site tools and automatic service reminders: One app, for every job, on your phone or back at the office.

More than 7,000 UK businesses trust GES to run their jobs, backed by 14 years in the market.

More than a basic gas certificate app, GES is a full system that runs the business issuing them, then turns this year's certificate into next year's booked work.

GROW YOUR BUSINESS
• Automatic service reminders keep loyal customers coming back year after year and book the repeat work for you
• Businesses on GES see an average 37% revenue increase in their first year
• Get paid faster with QR codes and payment links included with your invoices (powered by Crezco), with automatic chasing for late payers

LOSE THE PAPERWORK
• Quickly generate estimates, quotes, and invoices with templates or an AI draft, complete with statuses and payment tracking
• Convert accepted quotes into invoices in one tap
• UK gas, oil, and heat pump certificates, signed on-site and sent
• Send appointment confirmations to customers in one click
• Generate customer statements in seconds
• GES saves each person on the team 6.6+ hours a week

BUILT FOR HEATING & PLUMBING
• The entire GES workflow is designed around heating & plumbing jobs, not bolted onto a generic trades system
• Manage your jobs, your diary, and your team in one place. GES works perfectly for sole traders and larger operations that need to connect office staff with engineers
• Sync payments, customers, and invoices to Xero, QuickBooks, or Sage
• Pull readings from your Anton, Kane or TPI flue gas analyser straight into a certificate
• Reference 2,300+ boiler manual PDFs in the app, along with AI Assist to get the answers you need faster
• In-app calculators for gas rating, pipe sizing, installation volume, and tightness testing
• UK-built, with UK support that actually knows heating via phone, chat, and email
• Full offline access on the mobile apps, syncing when next online

TRUSTED WITH WHAT MATTERS
Your business data, certificates and property records are important, and the engine of your repeat work. GES has 14 years of experience keeping everything safe & adhering to data security best practices.

EVERY CERTIFICATE, BUILT IN
Gas: Homeowner Gas Safety Record · Landlord Gas Safety Record (CP12) · Gas Warning Notice · Gas Service Record · Gas Breakdown Record · Installation & Commissioning Checklist · Non-Domestic Gas Safety Record · Leisure Industry Gas Safety Record · LPG Gas Safety Record · Non-Domestic Testing & Purging Record · Non-Domestic Catering Record.
Oil: CD/10 Installation Completion · CD/11 Servicing & Commissioning · CD/12 Landlord Oil Installation Check · CD/14 Oil Warning & Advice Notice · TI/133D Oil Storage & Tank Risk Report.
Other: Air

Gas Engineer Software (GES) is more than just an easy-to-use gas certificate app. It’s an all-in-one gas engineer software designed to help sole traders and growing teams save time, stay organised, and get paid faster.

Whether you’re a gas engineer, oil engineer, or plumber, use GES to create all your industry certificates & records, issue quotes & invoices, manage schedules, and everything you need to run your business smoothly and professionally.

✔ Average of 6.6 hours saved each week
✔ Average revenue growth of 37% in the first year
✔ Trusted by 6,000+ businesses
✔ Set up in 3 minutes

OVERVIEW — MAIN FEATURES
• Gas cert app for issuing certificates, records, job sheets
• Send quotes and issue invoices
• Schedule jobs with an integrated calendar
• Manage your team from anywhere
• Automated boiler service reminders
• Manage your customer database
• Easy & organised job management
• Accounting software integrations
• Sync to web portal for easy office use
• Full offline access

OIL & GAS CERTIFICATE APP
• Easily create all oil and gas certificates
• Professional & accurate records compliant with the latest regulations.
• Easily track, organise & manage historical records.

GAS CERTIFICATES
• Homeowner Gas Safety Record
• Landlord Gas Safety Record
• Gas Warning Notice
• Gas Service Record
• Gas Breakdown Record
• Installation / Commissioning Checklist
• ND Gas Safety Record
• Leisure Industry Gas Safety Record
• LPG Gas Safety Record
• ND Gas Testing & Purging Record
• ND Catering Record

OIL CERTIFICATES
• CD/10 Oil Firing Installation Completion Report
• CD/11 Oil Firing Servicing and Commissioning Report
• CD/12 Landlord Oil Installation Check
• CD/14 Oil Warning and Advice Notice
• TI/133D Domestic Oil Storage, Tank Spillage and Fire Risk Report

QUOTING & INVOICING
• See all invoices & unpaid jobs & let GES chase late payers with automatic reminders.
• Send professional & customisable invoices seconds after the job has finished.
• Get your quotes in before your competitors. Use template line items for fast quotes.
• Quickly turn your quotes & estimates into invoices at the click of a button.

JOB SCHEDULING
• Simple & easy job creation for your team.
• See where your engineers are and who is available at a glance.
• Let engineers know what their schedule is without coming to the office.
• Eliminate booking errors and conflicts.

AUTOMATED REMINDERS
• Email & SMS boiler service reminders to find extra work.
• Quote follow-ups to win more jobs.
• Invoice payment reminders so you don’t have to chase late payers.
• All reminders are fully customisable

USER & TEAM MANAGEMENT
• Control what your team can see & do with user roles.
• Easily assign jobs to the right engineers at the right time.
• Full job history so you always know the ‘who’, ‘what’ & ‘when’ of every job.
• Our gas app is very easy & quick for your team to use.

CUSTOMER MANAGEMENT SOFTWARE (CRM)
• Access detailed customer information in seconds
• All information available o

Gas Installation Volume Calculator is now in the app! Work out installation and purge volumes, then check tightness test results on site.

You'll also find in this update:

● More Gas Service safety checks now include N/A, with N/A pre-selected across key Gas Safety and Gas Service questions
● CD/11 inspection field limits now match the issued record
● Various behind-the-scenes performance improvements