Every certificate.
One app. One subscription.
Electrical, PAT, fire and gas. Certably puts every certificate a UK trade issues into a single offline app — instead of four apps, four logins and four separate bills.
iPhone · iPad · Works fully offline · No account required
The maths
Multi-trade firms are billed four times
The incumbent apps sell one trade each. Do electrical and PAT and fire and gas, and you buy four subscriptions that never share a customer record between them.
Buying it a trade at a time
annual, single user-
Electrical
iCertifi
£125.99
-
PAT Testing
PAT Test Pro
£120.99
-
Fire & Emergency
iCertifi Fire + Fire Safe
£179.98
-
Gas
GasCert
£149.99
Total every year
£576.95
Certably Complete
£149 / year
All four trades. Unlimited certificates. One customer list, one site history, one bill.
You keep
£427.95
per engineer, every year
Only do electrical?
£99 / year
Still £26.99 a year less than the nearest equivalent. You are not subsidising trades you will never open.
Comparison uses list annual prices published by the respective vendors on 21 July 2026 for single-user plans. Certably pricing is indicative while the app is in build and may change before launch.
What's included
Four trades, one app
Every certificate is built to the current British Standard and reviewed by a qualified engineer before it ships. Pick a trade to see the full list.
Electrical
First releaseEICR, EIC, Minor Works, EV and Solar PV — signed off on site.
- Electrical Installation Condition Report (EICR)
- Electrical Installation Certificate (EIC)
- Domestic Electrical Installation Certificate
+7 more
PAT Testing
In Complete, after launchAsset registers, retest intervals and pass labels that survive an audit.
- PAT Test Certificate
- Appliance Asset Register
- Failed Appliance Report
+2 more
Fire & Emergency
In Complete, after launchBS 5839-1 and BS 5266-1 certificates, plus extinguisher servicing.
- Fire Detection & Alarm System Certificate (BS 5839-1)
- Fire Alarm Design, Installation and Commissioning
- Fire Alarm Periodic Inspection & Servicing
+3 more
Gas
In Complete, after launchLandlord Gas Safety Records, service and warning notices.
- Landlord Gas Safety Record (CP12)
- Domestic Gas Service & Maintenance Record
- Gas Warning Notice / Warning Advice Notice
+2 more
How it's built
Made for a plant room with no signal
Genuinely offline
Everything happens on the device. Basements, rooftops, riser cupboards — the app does not care whether you have a bar of signal, and nothing queues up waiting to sync.
One customer, every trade
Test a board in January and the extinguishers in June, and it is the same site record. Addresses, contacts and history stop being retyped four times.
Checked before you send
Missing observations, out-of-range Zs, an unclassified defect — flagged on the device before the certificate reaches your client, not after.
Photograph the defect
Attach a photo to any observation and it prints on the report in a numbered appendix — what you saw, next to what you wrote.
The whole site in one PDF
Every certificate at an address, oldest first, behind a single cover sheet. Built for the landlord's file and for handing a site to another firm.
Copies never carry readings
Duplicate last year's certificate and the circuits and wording carry over — but every reading and signature starts blank. A copied test result is not a test result.
Running a firm
Your QS should sign certificates they have actually read
Remote sign-off usually means the Qualified Supervisor pre-authorises a signature that then lands on certificates nobody reviewed. Certably gives them a real review queue instead: the finished certificate, then a signature or a rejection with notes.
- A review queue, not a pre-authorised stamp
- A login for every engineer, revoked when they leave
- Audit trail of who signed what, and when
- Shared customers and site history across the firm
Free, right now
Use the calculators while you wait
Browser-based, no sign-up, no email. Free permanently, whether or not you ever pay us a penny.
Max Zs calculator
Maximum permitted earth fault loop impedance for Type B, C and D devices, with the 80% figure for measured values.
Open calculator →
Ring final R1+R2
Predict the expected R1+R2 on a ring final before you test it, from cable size and ring length.
Open calculator →
PAT retest interval
Risk-based retest intervals following the IET Code of Practice 5th Edition.
Open calculator →
Early access
Be first on site with it
Certably is in build. Join the waitlist and you get early access, plus founder pricing locked for as long as you keep your subscription.
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