The Best Gas Certificate Apps Compared: What to Look for Before You Sign Up
A good gas certificate app can transform how you run your business — saving time on tedious admin and paperwork, keeping your records accurate, and cutting the back-and-forth that comes with managing certificates manually. But with a growing number of options on the market, it’s difficult to understand how they all stack up and which features you actually need.
This guide covers the main options available to UK gas engineers — gas-specific apps and general trades platforms — along with the five things worth checking before you sign up.
QUICK TIPS
What to look for in a gas certificate app
Before getting into specific apps, it’s worth being clear on the criteria that separate a good fit from one you’ll regret six months in.
1. Offline capability
Most jobs take you somewhere with limited or no signal — basements, rural properties, older buildings with thick walls. If your app needs a mobile data connection to open a certificate or save a record, that’s a problem waiting to surface at the worst possible moment.
Look for full offline mode, not “limited offline access.”
2. Certificate types covered
Not all apps support the same gas records. CP12 landlord gas safety certificates are likely to be your most used, but you’ll also want boiler service records, installation/commissioning checklists, warning notices, and so on. If you do oil work, or you’re starting to pick up heat pump installs, you’ll want those covered, too.
3. Ease of use on-site
This matters more than most people realise when they’re comparing features on a spreadsheet. If the app isn’t intuitive to use, you might end up spending longer on a certificate.
Look for an app that loads quickly, has a clean mobile layout, and puts common functions where you’d expect them. The only reliable test is using it on real jobs during the trial period.
4. Customer support
If something goes wrong, you need support that actually answers. Check whether the provider offers UK-based support, what channels they cover (phone, live chat, email), and what their hours are. “Email us and we’ll get back to you within two working days” isn’t a useful answer in a field business.
5. Full job management workflow
A certificate app that only handles certificates is one piece of a bigger puzzle. For sole traders who handle every part of the business themselves — quoting jobs, booking them in, issuing invoices, chasing renewals — using separate tools for each step means re-entering data and switching between apps throughout the day.
For businesses running a team of engineers alongside office or admin staff, the challenge is different but the cost is the same: jobs quoted in one place, scheduled in another, invoiced somewhere else creates gaps where things get missed.
Look for a platform that covers the full workflow: quoting and estimating, job scheduling, invoicing, customer records, and automated service reminders — with accounting integrations (QuickBooks, Xero, Sage) so your data moves automatically rather than being manually re-entered.
COMPARISONS
Gas certificate apps made for heating & plumbing pros
Gas Engineer Software
Gas Engineer Software is built from the ground up as a complete job management platform for gas and heating engineers — certificates, job management, invoicing, and automated reminders in a single connected system, rather than a certificate tool with extras bolted on.
That means no double data-entry. When you finish a job and raise an invoice, the customer and job details are already there. When a service reminder goes out to a landlord, it’s linked to the job and certificate history. For sole traders who wear every hat — engineer, bookkeeper, admin — it removes the overhead of running multiple systems. For teams, it enables engineers and admin staff stay connected remotely.
Key features:
- Complete range of gas and oil certificates
- Full offline access — complete and save any certificate with no signal; records sync automatically when you’re back online
- Job scheduling and diary management
- Quoting and estimating
- Invoicing, with direct sync to QuickBooks, Xero, and Sage (Pro plan)
- Automated service reminders sent to landlords and customers
- Customer records and full job history in one place
- Full library of boiler manuals to reference on the job
- iOS and Android apps
Pricing: Plans start from £18 per user per month on an annual plan. The Core plan is £23/month and includes scheduling, quoting, invoicing, and automated service reminders. The Pro plan is £30/month and adds accounting integrations. No setup fees, no contracts, and all plans include a free trial with full access to every feature.
Best for: Gas and heating engineers who want certificates, job management, invoicing, and automated reminders in a single platform — whether you’re a sole trader running the whole business yourself or a team that needs engineers and admin connected to the same system.
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Gas Certificate App
Gas Certificate App covers CP12s, LGSRs, oil certificates, powerflush certificates, and heat pump checklists. The platform also includes invoicing and quoting tools, calendar and diary management, job sheets, and automatic annual reminders to landlords. Offline mode is supported — certificates and customer data are accessible without internet, with records syncing when back online.
It doesn’t include job dispatch, CRM, or business reporting, so it sits closer to a certificate-and-workflow tool than a full field service management platform.
Great for: Certificate-focused engineers who also want invoicing and diary management in the same app.
Gas App UK
Gas App UK’s main draw is its reference library — thousands of boiler manuals (domestic and commercial, current and obsolete), calculators, and industry documents, alongside a community fault-finding forum used by 80,000+ member engineers. On the certificate side, it covers digital gas safety forms, LGSRs, and job sheets, with a calendar and basic invoicing also included. The core app is free to download.
It’s not a job management platform — there’s no scheduling, dispatch, or CRM — so businesses that need those functions would need to pair it with a separate tool.
Great for: Engineers who want certificate tools and a comprehensive boiler manual library in one place.
Easy Safety Cert
Easy Safety Cert covers core gas certificate types and is aimed at engineers who want a straightforward digital replacement for paper records. It’s a lighter-weight option without job management, scheduling, or invoicing functionality.
Great for: Engineers who want a basic, focused certificate tool with minimal setup.
iCertifi
iCertifi has been in the UK gas certificate market for a number of years and supports a range of gas safety records. It’s a recognised name among engineers who’ve been researching options for a while.
Great for: Engineers looking for a certificate tool with an established presence in the market.
General trades software
These platforms are designed for tradespeople across multiple industries — electricians, plumbers, builders, gas engineers — rather than specifically for the gas and heating sector. Job management, quoting, and invoicing tend to be strong; gas-specific certificate coverage varies, and it’s worth checking the exact records supported before committing. Some may require additional purchases for specific certificate types, or to have them custom developed.
Powered Now
Powered Now is a UK-based field service management platform covering job scheduling, quoting, invoicing (VAT, CIS, and Domestic Reverse Charge compliant), expense tracking, and team management. Gas safety certificates are included alongside electrical and construction records.
The certificate tools sit within a general forms module rather than being purpose-built for gas work, and miss useful features like a built-in gas rate calculator and flue gas analyser integrations. For businesses where gas is the primary trade, a platform built specifically for that work will make life easier while on the job.
Pricing: From £28/month.
Great for: Mixed-trade businesses that need general job management alongside gas certificate support.
Tradify
Tradify covers job scheduling, quoting, invoicing, timesheets, and purchase orders, with accounting software integrations. It’s a job management platform designed for tradespeople generally, not gas engineers specifically.
Gas certificate functionality is limited compared to gas-specific platforms — engineers using Tradify for gas work may also run a separate certificate app alongside it, which adds another system to manage.
Best for: Trades businesses where the priority is job management and invoicing, with lower gas certificate volume.
| App | Gas-specific | Offline | Certificates | Invoicing | Job management | Starting price |
|---|---|---|---|---|---|---|
| Gas Engineer Software | ✓ | ✓ | ✓ Full | ✓ | ✓ | £18/month |
| Gas Certificate App | ✓ | ✓ | ✓ Full | ✓ | Limited | £20/month |
| iCertifi | ✓ | ✓ | ✓ | — | Limited | £25.99/month |
| Easy Safety Cert | ✓ | ✓ | ✓ | — | ✘ | — |
| Gas App UK | ✓ | ✓ | ✓ | Limited | ✘ | Free, or £14.99 for Premium |
| Powered Now | ✘ | ✓ | Limited | ✓ | ✓ | £28/month |
| Tradify | ✘ | ✓ | Limited | ✓ | ✓ | £34/month |
| Pricing for apps at time of publishing — check each provider's website for current plans. | ||||||
Gas Engineer Software is 100% free to try.
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Frequently Asked Questions
What is the best gas certificate app for sole traders in the UK?
Gas Engineer Software’s plans start from £18/user/month and are used by sole traders across the UK — covering certificates, job scheduling, invoicing, and automated service reminders without needing a second system for admin. A certificate-only plan exists at a lower price point for engineers whose main requirement is digital certificates. Full pricing details.
Can I use a gas certificate app without internet access?
The better apps support full offline working. Gas Engineer Software’s mobile app works completely offline and syncs automatically when signal returns. Check offline capability specifically during any trial — preferably on a real job at a challenging location — as offline support varies more than most apps admit in their marketing.
Do gas certificate apps work on iPhone?
Yes. The main UK gas certificate apps — including Gas Engineer Software — have dedicated iOS apps on the App Store. Android is covered across all the main options. Both platforms should be tested if your team uses a mix of devices.
How much do gas certificate apps cost?
Most apps charge a monthly subscription per user. Gas Engineer Software starts from £18 per user per month on an annual plan, with higher tiers at £23 (Core) and £30 (Pro with accounting integrations).
What certificates can I create with a gas certificate app?
Most UK gas certificate apps cover CP12 landlord gas safety certificates and boiler service records as standard. Gas Engineer Software also covers gas tightness test records, oil records and certificates, job sheets. Check the full certificate list for any app you’re considering if you do oil work or heat pump installs alongside standard gas jobs.
What’s the difference between a gas certificate app and general trades software?
Gas-specific apps and platforms are built around the certificate types, workflows, and compliance requirements that gas engineers need — CP12s, gas tightness records, oil certificates. General trades software is designed for any tradesperson and tends to be stronger on job management and invoicing, but may have more limited gas certificate support. For a business where gas work is the core, a gas-specific platform will typically cover the compliance detail more thoroughly.