Gas Engineer App
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Gas certificate app for UK gas engineers

Paperwork done before you leave site

Gas certificates, quotes, invoices and jobs in one app. Built for UK gas engineers.

Get the app
Download on theApp Store Get it onGoogle Play
90-day free trial No card details £7.99/month after
Try the live demo

Built for engineers

Every tool you use on a job, in your pocket

Works on phone, tablet and computer. Start on site, finish at the van, send before you drive off.

  • Digital certificatesCP12, CP14, service, breakdown, commissioning and more
  • AutomationsAccepted quotes become invoices and unpaid balances get chased
  • Service remindersSMS or email when a customer's annual check is due
  • Quotes & invoicesBranded, priced and sent in minutes
  • Boiler manualsSearch by make, model or GC number
  • Customer CRMCustomers, properties, appliances and job history
  • Gas rate calculatorGross and net kW from your meter readings
  • Tightness testGas volume, allowed drop and pass or fail to IGEM/UP/1B Ed. 4
  • Job schedulingA diary to plan, assign and track every job
Certificates & records included
CP12 Gas Safety Record CP14 Gas Warning Notice Service / Maintenance Gas Breakdown Record Boiler Commissioning Power-flush Certificate Job Sheet
New certificate screen listing CP12, CP14, service, breakdown, commissioning and power-flush records
Gas rate calculator showing 1.32 m³/h, 14.81 kW gross and 13.46 kW net

  • Digital signatures

    Customer and engineer sign on screen. No printing or scanning.

  • Photos & attachments

    Add photos of appliances, meters and flues to any job or record.

  • Send from site

    Email certificates, quotes and invoices to customers before you leave.

Free up 8+ hours of admin every week.

  • No paper forms or carbon copies
  • Records ready to resend at any time
  • Gas Safe details on every record
  • One login on phone, tablet and computer

App screens

Dashboard with new certificate, customers, jobs, quotes and invoices
DashboardEverything one tap away
New certificate picker
New certificateCP12, CP14 and more
Gas rate calculator
Gas rateGross and net kW on site
Tightness test calculator to IGEM/UP/1B Ed. 4 with pipe runs and pipework volume
Tightness testIGEM/UP/1B Ed. 4 volumes
Tightness test step 2: meter type, test type, test pressure and observed pressure drop with allowed drop of 2.5 mbar
Meter & testAllowed drop worked out
Tightness test result: pass, 2.0 mbar drop against 2.5 mbar allowed, with installation volume breakdown
Test resultPass or fail, with the maths
Settings with profile, company, bank details and subscription
SettingsCompany, bank and team

Live demo

Try the app before you sign up

Click around the real app, loaded with sample customers, jobs and certificates. No account or download needed.

app.gasengineerapp.co.uk
Gas Engineer App web portal dashboard with expired CP12s, renewals due, unpaid invoices, today's jobs and upcoming work

Web app

The office portal

Customers, jobs, calendar, records, quotes and invoices on a big screen.

Open web demo
Gas Engineer App mobile dashboard

Mobile app

On site, on your phone

iPhone and Android: issue certificates and use the gas calculators.

Open mobile demo

Demo login: tap “Email me a login code”, then enter any 6 digits. All customers and addresses in the demo are fictional.

Gas engineer testing a combination boiler with a digital manometer

Accurate on site

Readings in, certificate out

Enter what you measure and the app does the maths. Compare the result with the appliance data plate and record it straight onto the certificate.

Gross heat input, natural gas kW = m³/h × 39.5 MJ/m³ × 1.02264 ÷ 3.6
6,000+Boiler manuals and parts guides
8+ hrsAdmin saved each week
90 daysFree trial, no card needed

Pricing

One plan. Every feature.

No contract. Cancel whenever you like.

Free trial

£0/ 90 days

Full access. No card details required.

Start free trial
Save £15.89

Yearly

£79.99/ year

Two months free compared with monthly.

Subscribe yearly
Every plan includes
  • Digital certificates
  • Automations
  • Service reminders
  • Quotes & invoices
  • Boiler manuals
  • Customer CRM
  • Gas rate calculator
  • Tightness test
  • Job scheduling
  • Web, iOS and Android

FAQ

Questions engineers ask

Up and running in three steps

  1. Download the appiOS, Android or web. No card details needed.
  2. Import your customersBring existing customers and properties across in bulk.
  3. Issue your first CP12Complete, sign and send it before you leave site.
Start free trial
What certificates and records can I create?

CP12 Gas Safety Records, CP14 Gas Warning Notices, service and maintenance records, breakdown records, boiler commissioning, power-flush certificates and job sheets. Everything is stored digitally and ready to resend.

Will it work on site without internet?

Yes. Keep completing certificates and recording job details offline. When your device reconnects, the data syncs automatically.

Can I bring my existing customers across?

Yes. Import customer details and property addresses in bulk, so you don't start from scratch.

Can I add my company branding?

Certificates, quotes and invoices carry your logo and business details, so every document looks consistent.

How are signatures collected?

Customers and engineers sign on screen. The signature is attached to the document and saved with the job record.

Am I tied into a contract?

No. Pay monthly or yearly and cancel whenever you like. Start with a 90-day free trial with no card details.

How is my data protected?

Records are held on secure systems with controlled access and encrypted backups. Only authorised users can see your account data.

Leave the paperwork on site

Try every feature free for 90 days. No card details. Set up in minutes.

Start free trial
Download on theApp Store Get it onGoogle Play