SOFTWARE BUYING GUIDE · PUBLISHED BY ESSENTIAL
Choose the paperwork software that fits your work.
The best gas certificate app for your business depends on the records you issue, the people who need access and how you work on site. This guide is published by Essential Heating Services Limited, a software provider—not an independent ranking.
View Essential pricingFollow the workflow
- Choose three real job types and compare the questions.
- Create a fictional example and inspect the PDF on phone and A4.
- Check the complete team cost and the features you would lose by switching.
- Test retrieval, exports and support before committing.
Start with the documents, not the feature count
List the records you actually need, then inspect their questions and finished PDFs. A product with many forms may still omit a field important to your work. Check service, landlord, LPG and specialist record coverage separately.
Essential has 22 active record types, plus quotes and invoices. Its original work records do not replace required scheme or manufacturer documents. ASHP service is supported; ASHP commissioning and oil records are not currently offered.
Compare the total cost for your team
Use the number of engineers who need access, the billing period and any required add-ons. Compare annual upfront totals with twelve monthly payments, and check introductory-rate retention and renewal terms.
Essential includes up to two engineers in its base package, with paid additional places. Current rates and the separate first-payment offer are on the pricing page. Check each provider’s own checkout for current VAT treatment and exact terms.
Check access where you work
Try the software on the phones, tablets and computers your team uses. Ask whether it is browser-based or a native app, what happens without a connection, and whether saving synchronises across devices.
Essential runs in a web browser. It does not advertise a native mobile app or offline certificate workflow. If reliable offline work is essential to your jobs, compare products with explicit offline support before choosing.
Follow the whole document journey
Test a fictional draft, its review and signature steps, the final PDF, record retrieval and backup/export options. Check how changes to an issued document are handled and whether warning notices keep their references.
Essential supports reviewed and signed certificate records, company numbering, linked warnings on supported records, account saving and editable workspace recovery backups. Quote and invoice documents have their own numbering and issued snapshots.
Look beyond certificates
Decide whether you also need quotations, invoices, scheduling, accounting links, customer payment collection, automatic reminders or a customer portal. Do not assume that an invoice feature includes all of these.
Essential supplies company-branded quotes and invoices, configurable payment terms, optional VAT and a cash-paid invoice option. It does not advertise accounting integrations, automatic reminders or customer payment collection. Gmail connection is available; other supported mailbox methods may require provider-specific setup.
Ask about support and portability
Ask how to contact support, how your team will be onboarded, what can be exported and what happens if the subscription ends. Review the actual terms rather than assuming permanent access to every feature.
Essential support is by email at support@essentialheatingservices.co.uk. No response-time guarantee or telephone support package is claimed here. You can review the public samples and prepare supported free-account drafts before subscribing.
Provider facts to compare
Checked on official provider pages on 25 October 2026. This is a published-feature comparison, not hands-on testing or a ranking. Plans and prices can change. Annual amounts and VAT treatment are stated only where verified.
| Provider and source | Price and people | Records and business features | Access, exports and support | Check before choosing |
|---|---|---|---|---|
| Gas Engineer Software | Monthly: Starter £19; Core £25/user; Pro £32/user, excluding VAT. Annual billing is available; confirm the selected team total on its pricing page. | Certificates on Starter. Core adds quotes, invoices, scheduling and reminders; Pro adds accounting integrations. | Web portal plus iOS/Android apps; offline mobile access is advertised. Web exports and provider-assisted document export; phone, email and message support advertised. | Starter is a single-user certificate-focused plan. Compare Core or Pro if you need the broader workflow. |
| Gas Certificate App | £20 + VAT per user/month or £216 + VAT per user/year. Main, additional and admin users are charged individually. | Certificates, jobs, customers, quotes and invoices; features depend on role and device. | Mobile and desktop. Offline Mode supports selected mobile certificate work, not every feature. Direct QuickBooks connection and Xero data export are different workflows. UK-based support advertised. | Check role permissions and offline limitations. Optional SMS is not included in the base price. |
| GasPro | £7.99/month or £79.99/year for the first engineer; £5.99/month or £59.99/year for each additional engineer. VAT treatment was not established in this review. | Certificates, quotes, invoices and an integrated calendar are advertised. | Offline access with later synchronisation is advertised. In-app chat support advertised. Bulk export scope was not verified. | Confirm the exact record range, tax treatment, exports and device requirements before subscribing; no promotional discount is assumed. |
| Checker | Lite £10.99/month or £109.99/year; Pro £19.99 or £199.99; Pro+ £25.99 or £259.99. Prices plus VAT; verify extra-user costs. | Lite lists records, quotes and invoices. Pro adds CRM, reminders and accounting links. | Phone, tablet and desktop; offline form completion and later synchronisation advertised. Pro lists financial exports. Confirm support arrangements and full record export requirements directly. | Team sub-users are on Pro+. Check the plan before comparing a multi-engineer business. |
Essential: browser-based records, quotes and invoices, with two engineers included. No native/offline app, accounting integration, automated reminders or customer payment collection is advertised. Email support and editable workspace recovery backups are available. Compare the current Essential price and engineer allowance.
Before you choose
Is Essential the best gas certificate app in the UK?
There is no verified independent evidence here for that claim. Essential may suit engineers who want browser-based certificates, quotes and invoices together. A business needing offline native apps, scheduling or accounting integrations should compare those requirements carefully.