Comparison

Gas Engineer Software vs PAT Testing Log & Cert

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gas Engineer Software

This comprehensive app helps gas, oil, and plumbing professionals streamline their business operations. It allows for the creation of industry-specific certificates, issuance of quotes and invoices, and efficient job scheduling. Manage your team, customers, and finances from any device, anywhere, saving time and boosting revenue.

Highlights
  • Create industry certificates
  • Issue quotes and invoices
  • Schedule jobs with calendar
  • Manage team and customers
  • Automated service reminders
  • Offline access
Features
Read full description

Gas Engineer Software (GES) is more than just an easy-to-use gas certificate app. It’s an all-in-one gas engineer software perfect for heating professionals. 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 lots more. Save hours each week and run a successful heating & plumbing business on any device, from anywhere, and at any time. • 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 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 on your mobile device • Keep all customer information in one consolidated place. • See which customer hasn’t paid & let our software send automated reminders. SOFTWARE INTEGRATIONS • Xero, QuickBooks & Sage accounting software • Anton, Kane & TPI flue gas analysers • Crezco open banking payments REQUEST A DEMO If you want to see the app in action or get a better idea of how it works, book a demo with our team. We’ll give you a thorough walkthrough & answer any questions. https://gasengineersoftware.co.uk/gas-engineer-software-demo/ QUESTIONS? Contact our customer support team at support@gasengineersoftware.co.uk or 0207 129 7058

About

PAT Testing Log & Cert

Features
Read full description

PATBook is an offline PAT log and certificate maker for electricians, PAT testers, and landlord-compliance contractors. Record every portable-appliance test on your phone, build an asset register with next-due dates, and produce a PDF certificate on site. WHAT IT DOES • Record each appliance: asset ID, description, class (I, II, III), location and photos • Enter readings from any PAT tester: visual inspection, earth continuity (Ω), insulation resistance (MΩ), lead/polarity, functional check, and optional load/leakage (mA) • Mark the overall PASS or FAIL result: your professional judgement, recorded and not calculated • Set a risk-based retest interval on each test and see the next-due date • Build an asset register across multiple sites and clients • See what is coming up for retest, soonest first, with optional reminders • Generate a PDF PAT test certificate and a PDF asset register report • Export the asset register as CSV • Open a test photo full screen, share it, or attach the photos to the certificate as an appendix • Scan a barcode or QR asset tag to recall an appliance, or type the ID by hand • Put your name, company, competency and signature on every certificate • Works offline, with no account and no sign-in HOW IT WORKS Add a site, then its appliances. Log a test (visual, earth continuity, insulation resistance, polarity and functional checks) and record PASS or FAIL. PATBook tracks the next-due date, lists what is due soonest, and generates the certificate and the register as PDFs you can share or print. WHO IT'S FOR • Electricians who carry out portable appliance testing • Dedicated PAT testers and testing-services sole traders • Landlord and letting-agent compliance contractors • Facilities and maintenance staff testing their own equipment YOUR RECORDS STAY YOURS Sites, appliances, and test results are stored on your device. PATBook is a record-keeping and certificate-preparation tool. It does not determine or guarantee whether any appliance is safe. PASS or FAIL is your professional judgement, based on your own visual inspection and instrument readings. Test methods, pass limits, and retest intervals must follow the current IET Code of Practice and your own risk assessment. SUBSCRIPTION AND PURCHASE TERMS PATBook Pro is available as an auto-renewing monthly or yearly subscription, or as a one-time Lifetime unlock, which does not renew. Current prices are shown in the app before you buy. Pro lifts the limits on sites and appliances and removes the certificate watermark. Everything you have already recorded stays readable and exportable whether or not you subscribe. The limits apply only to new entries. Subscriptions are charged to your Apple Account at confirmation of purchase and renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel a subscription in your Apple Account settings. Privacy Policy: https://clearstackapps.com/privacy Contact: support@clearstackapps.com Terms of Use (EULA): https://clearstackapps.com/terms

Screenshots

Gas Engineer Software4 screens
PAT Testing Log & Cert4 screens

Verdict

The call

The clearest difference is device support: Gas Engineer Software at 3 against PAT Testing Log & Cert's 1. Gas Engineer Software also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gas Engineer Software sells 1 one-off in-app purchase and PAT Testing Log & Cert sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 6 level
Gas Engineer Software versus PAT Testing Log & Cert: the parameters behind the verdict, then further details
ParameterGas Engineer SoftwarePAT Testing Log & Cert
PriceFreeFree
Positive reviews84.6% of reviews—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size196 MB5 MB
Age rating4+4+
DeveloperSoftware Works for You LtdClearStack Apps

Bugs and requests

Gas Engineer Software

Reported bugs

5 issues
  • Unexpected site shutdowns
  • Syncing is slow
  • Glitches in invoicing following a job report
  • App has become very slow due to latest update
  • Not usable at present time

Requested features

6 requests
  • Add multiple picture attachments
  • Select several photos at once
  • Flag jobs as finished
  • Oil forms for non-OFTEC registered companies
  • Calculate pipe work volume and purge volume
Show 1 more
  • Cheaper option for extra engineers

PAT Testing Log & Cert

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Gas Engineer Software

One-time1
  • Single Engineer - 12 Months Subscription$19.00
3 purchases

PAT Testing Log & Cert

Subscriptions2
  • PATBook Pro Monthly$2.991 Month
  • PATBook Pro Yearly$29.991 Year
One-time1
  • PATBook Pro Lifetime$79.99

Questions

Is Gas Engineer Software free?
Gas Engineer Software is free to download, with in-app purchases available.
Is PAT Testing Log & Cert free?
PAT Testing Log & Cert is free to download, with in-app purchases available.
Do Gas Engineer Software or PAT Testing Log & Cert have ads?
Neither Gas Engineer Software nor PAT Testing Log & Cert shows ads.
Which is updated more often, Gas Engineer Software or PAT Testing Log & Cert?
Gas Engineer Software ships an update weekly, and PAT Testing Log & Cert weekly. Most recently, Gas Engineer Software was updated on October 13, 2026 and PAT Testing Log & Cert on October 1, 2026.

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