Best CP12 certificate apps for UK gas engineers (2026)
Apps for filling in landlord gas safety records (CP12/LGSR), service records and other gas paperwork on site, then emailing the PDF before you leave.
Quick answer: The lowest paid starting price we verified is GasPro (from £7.99/mo). Cheapest isn't always best. Check the points below before you pick.
Side by side
| Tool | Starting price | Free trial | Suits | Checked |
|---|---|---|---|---|
| GasPro | from £7.99/mo | 14 days, no card | sole trader, small firm | 20 Oct 2026 |
| Checker (formerly Gas Checker) | from £10.99/mo | 30 days, no card | sole trader, small firm | 20 Oct 2026 |
| Manifold | from £15/mo | 30 days, no card | sole trader, small firm | 20 Oct 2026 |
| Gas Engineer Software (GES) | from £18/mo | Yes (length not stated on pricing page) | sole trader, small firm | 20 Oct 2026 |
| OnPoint | from £19/mo | 14 days, no card | sole trader, small firm | 20 Oct 2026 |
| Gas Certificate App | from £20/mo | 14 days, no card | sole trader, small firm | 20 Oct 2026 |
| Maintivo | from £34.99/mo | First report free | sole trader, small firm | 20 Oct 2026 |
| Easy Safety Cert (GasCert / PatCert) | Price not verified | Free trial offered | sole trader | Not verified |
| Gas Cert (by iCertifi) | Price not verified | Yes (see vendor site) | sole trader, small firm | Not verified |
How to choose
- Check it has every form you issue (CP12, warning notice, service record, commissioning, tightness test).
- Check it works offline: plant rooms and cellars have no signal.
- Look at the per-user price if you will add engineers later.
- Check whether reminders and invoicing are on the cheapest plan or only higher tiers.
Good starting points for sole traders
- GasPro: from £7.99/mo. Gas certificates incl. CP12.
- Checker (formerly Gas Checker): from £10.99/mo. Unlimited certificates on every plan (gas, oil, electrical, renewables).
- Manifold: from £15/mo. Digital CP12s.
- Gas Engineer Software (GES): from £18/mo. CP12 / landlord gas safety records.
- OnPoint: from £19/mo. Landlord gas safety records (CP12) validated as you fill them in.
Prices are as shown on each vendor's own pricing page on the date in the table, usually excluding VAT. "Not verified" means we couldn't confirm the price on the vendor's site. Spotted a change? Report it.
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