Checker (formerly Gas Checker)

Certificates & CP12 · For gas, heating, plumbing · Suits sole trader and small firms

Price

from £10.99/mo

Lite £10.99/mo (£109.99/yr); Pro £19.99/mo (£199.99/yr); Pro+ £25.99/mo (£259.99/yr) plus £10.99/mo per sub-user. All + VAT.

Free trial: 30 days, no card

Checked on the vendor's site 20 Oct 2026

Source: https://checker.app/pricing/

Visit Checker (formerly Gas Checker)

Key features

Unlimited certificates on every plan (gas, oil, electrical, renewables)
Quotes, invoices, job sheets
Service reminders and CRM on Pro
Works offline
KANE analyser and Zettle integrations

Who it suits

Works for sole traders and small firms.

Compare Checker (formerly Gas Checker)

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Alternatives

Easy Safety Cert (GasCert / PatCert)

Certificates & CP12

£25 + VAT for 50 jobs/yr

Pay as you go: £25 plus VAT for 50 jobs per year (the default option on the pricing page), with larger job bundles available. No annual subscription or tie-ins.

sole trader Price checked 20 Oct 2026

Gas Cert (by iCertifi)

Certificates & CP12

from £24.99/mo

GasCert: £24.99 a month or £149 for 12 months; Enterprise £490 for 12 months. Prices include VAT and are billed through the App Store.

sole tradersmall firm Price checked 20 Oct 2026

Gas Certificate App

Certificates & CP12

from £20/mo

£20 + VAT per user per month, or £216 + VAT per user per year. One plan, no feature tiers.

sole tradersmall firm Price checked 20 Oct 2026

Compare all CP12 certificate apps →