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Create certificates and explore jobs, quotes and invoices before you decide whether to subscribe. No payment card is required.
Built for gas engineers
Create digital certificates with built-in tools, manage jobs and customers, send appointment reminders, reuse previous work and handle quotes and invoices across mobile and desktop.
No payment card required.
One connected workflow across mobile and desktop
Everything from day one
Get the complete Gas Certificate App toolkit from the start, whether you work alone or manage a growing team.
Create certificates and explore jobs, quotes and invoices before you decide whether to subscribe. No payment card is required.
No basic, pro or premium packages to pick through. Each user is £20 + VAT per month or £216 + VAT per year.
Give Additional Users access to the tools they need while the Main Engineer stays in control of their permissions.
Made for the working day
Complete certificates, check calculations, find boiler information and keep customers updated without jumping between different apps.
Returning to the same property or completing similar work? Duplicate an existing certificate, then update the details that have changed.
Create and manage domestic, non-domestic, oil and other job records from the same app, then send the completed paperwork to your customer.
Work out the gas rate while completing the job, without leaving the certificate to find a separate calculator.
Open the relevant boiler manual while working on a certificate, so the information you need stays close to the job.
Send reminders by email and let customers accept or decline, helping you confirm visits before setting off.
Prepare Offline Mode before losing signal, create new certificate work on your mobile, then sync it after reconnecting.
How Offline Mode works
Mobile Offline Mode
Basements, plant rooms and rural jobs are not always kind to phone signal. Switch Offline Mode on before you lose connection, then create and save new certificate work on your mobile.
Open the mobile app while connected and switch Offline Mode on.
Create and save new certificate work on your mobile without an internet connection.
Reconnect and sync the saved work back to your Gas Certificate App account.
One plan, flexible user access
Gas Certificate App does not hide features behind pricing tiers. Choose monthly or yearly billing, add the users you need and set their access to suit the way your business works.
Monthly prices selected.
For account owners and lead engineers, with full app and user-management access.
£20 + VAT per month, billed monthly.
Start 14-day free trialFor another engineer or team member. The Main Engineer can control their permissions.
£20 + VAT per month, billed monthly.
Compare role accessFor office staff managing customers, jobs and business admin without completing engineer-only work.
£20 + VAT per month, billed monthly.
Compare role accessEvery user role is £20 + VAT per month or £216 + VAT per year. Yearly billing works out at £18 + VAT per month and saves 10%.
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Domestic Gas Certificates | Included | Included | Assign only |
| Commercial Gas Certificates | Included | Included | Assign only |
| LPG Certificates | Included | Included | Assign only |
| Oil Certificates | Included | Included | Assign only |
| Renewable Certificates | Included | Included | Assign only |
| Miscellaneous Certificates | Included | Included | Assign only |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Upcoming Certificate Reminders Dashboard | Included | Included | Included |
| Customer acceptance or decline of upcoming certificate reminders | Included | Included | Included |
| Import readings from supported Testo, TPI and Sauermann analysers | Included | Included | Not included |
| View a boiler manual while completing a certificate | Included | Included | Not included |
| Create an invoice from a certificate | Included | Included | Included |
| Digital signatures | Included | Included | Included |
| Share by WhatsApp, SMS and email | Included | Included | Included |
| Upload a company, Gas Safe or OFTEC logo | Included | Included | Included |
| Upload photos and files | Included | Included | Included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Gas Rate Calculator | Included | Included | Not included |
| Boiler Manuals | Included | Included | Included |
| Import readings from supported Testo, TPI and Sauermann analysers | Included | Included | Not included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Offline Mode | Included | Included | Included |
| Email status tracking | Included | Included | Included |
| Import a customer database | Included | Included | Included |
| In-app notifications | Included | Included | Included |
| Automated SMS reminders (add-on) | Included | Included | Included |
| Postcode lookup | Included | Included | Included |
| Unlimited storage | Included | Included | Included |
| To-do list | Included | Included | Included |
| Access on Apple, Android and desktop | Included | Included | Included |
| Live chat and telephone customer support | Included | Included | Included |
| Manage user permissions | Included | Available with permission | Included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Invoice payment reminders | Included | Included | Included |
| Opened and unopened status tracking | Included | Included | Included |
| Advanced reporting | Included | Included | Included |
| VAT calculations | Included | Included | Included |
| Mark invoices as paid or unpaid | Included | Included | Included |
| Share by WhatsApp, SMS and email | Included | Included | Included |
| Upload photos and files | Included | Included | Included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Accept or decline notifications | Included | Included | Included |
| Convert a quote to an invoice | Included | Included | Included |
| Share by WhatsApp, SMS and email | Included | Included | Included |
| Opened and unopened status tracking | Included | Included | Included |
| Upload photos and files | Included | Included | Included |
| Advanced dashboard | Included | Included | Included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| Job sheets | Included | Included | Included |
| Job scheduling calendar | Included | Included | Included |
| Link jobs to customers | Included | Included | Included |
| Job notes and details | Included | Included | Included |
| Engineer notifications and alerts | Included | Included | Included |
| Multi-engineer scheduling | Included | Available with permission | Included |
| Feature | Main Engineer | Additional User | Admin User |
|---|---|---|---|
| QuickBooks integration | Included | Included | Included |
| Xero data export | Included | Included | Included |
| SMS reminder system | Included | Included | Included |
| Email and in-app notifications | Included | Included | Included |
| Import customer data by CSV or reports | Included | Included | Included |
Available with permission means the Main Engineer can enable access for that Additional User. Optional SMS reminders require paid credits. Offline Mode is for supported mobile certificate work and must be switched on before losing connection.
Connected workflows
Gas Certificate App supports accounting workflows with QuickBooks and Xero, and can import readings from compatible Testo, TPI and Sauermann gas analysers.
QuickBooks uses an integration, Xero uses a supported data export, and analyser compatibility depends on the device and model.
Ask about compatibilityConnect your billing workflow with the Gas Certificate App QuickBooks integration.
Export supported data from Gas Certificate App for use in your Xero accounting workflow.
Clear answers
Straightforward answers about certificates, pricing, devices, offline work, accounting connections and team access.
10 common questions answered
Ready when you are
Explore certificates, job management and customer records across mobile and desktop. No payment card is required to begin your trial.