AI Snap & FillNew
Photograph the boiler nameplate. AI reads make, model, type, flue and kW, then fills the appliance card.
How AI Snap & Fill worksBuilt for UK gas safety engineers
Issue a gas safety certificate in minutes.
Gas safety certificate software for UK Gas Safe registered engineers. Create CP12 and CP17 certificates, invoices, quotes and job sheets on your phone, and send them before you leave the property.
- 14 days free, no auto-charge
- Cancel anytime
- UK GDPR compliant
Built for UK Gas Safe engineers Encrypted in transit and at rest Auto-sync across all your devices Branded PDFs with your logo and colours Verifiable certificates with QR codes Works on Android and iPhone
Everything an engineer needs
One app. Every document.
Stop juggling paper pads, Word templates and spreadsheets. Medium Link is gas engineer software that keeps your whole business in one place.
CP12 Domestic
Landlord's Gas Safety Record in minutes. Multi-appliance, full combustion analyser, e-signature.
CP12 certificate softwareCP17 Commercial
Non-domestic Gas Installation Safety Reports: warning notices, tightness testing, pipework checks.
Commercial gas certificatesInvoices & Quotes
Send branded invoices the same day. VAT support, payment tracking and PDF download.
Invoicing and quotesJob Sheets
Record work, materials and customer sign-off on site, with no separate paper trail.
See every featureRenewal Reminders
Automated emails 30 and 7 days before each CP12 expires, so no customer slips through.
Reminders and the restMedium Link is software for the engineer doing the work. We do not carry out gas safety inspections. Your certificate is valid because you are Gas Safe registered and you signed it.
Industry first
Tap a button. Point at the badge. The form fills itself.
AI Snap & Fill reads the boiler's data plate, identifies the make, model, type, flue type and rated kW, then fills your appliance section in one tap.
- Recognises 100+ UK boiler models out of the box
- Cross-checks make against the model code and corrects badge mismatches
- Fills heat input (kW) even when implied by the model name
- Always editable. The engineer stays in control.
How it works
From nameplate to issued certificate in minutes.
Step 1: Photograph the nameplate
Tap "AI Snap & Fill" inside any appliance card. Your phone's rear camera opens. Snap the boiler's data plate.
Step 2: AI fills the form
Make, model, type, flue and rated kW appear in the correct fields. Check them and edit anything you need.
Step 3: Email the PDF
Add your e-signature and press send. The landlord receives the certificate and the job is closed.
Desktop dashboard
Every job, invoice and renewal, on one screen.
Sign in on a laptop and your work becomes numbers you can act on: this week's jobs, the money you are owed and the renewals coming due.
- See certificates, paid revenue, invoices and renewals over any window, from the last 24 hours to all time.
- Chase unpaid invoices in place. Mark one paid, or send a reminder with the invoice PDF attached.
- Catch renewals before they lapse. Due soon shows amber, overdue shows red, one tap emails the customer.
- A certificate already re-issued for the same property never shows as overdue.
For landlords and tenants
Confirm a certificate is genuine.
Every Medium Link certificate carries a unique verification code and a QR code. Visit the verification page to confirm it is authentic. No login needed.
Verify a certificateWhat verification tells you
- Certificate is authentic and has not been tampered with
- Issuing company and engineer details
- Inspection date and next renewal date
- Cryptographic proof that cannot be backdated
Simple pricing
Try free for 14 days. Then pick your plan.
Two plans, no lock-in. Month to month, cancel any time. No fees, no calls, no silent price hikes.
Basic
Invoicing and quoting for your day to day.
£3.99/month
- Unlimited invoices and quotes
- Unlimited job sheets
- Customer and landlord database
- Branded PDFs with your logo
- Email delivery to your customers
- Works offline, syncs when you reconnect
Start free trial
14 days free. Cancel before it ends to pay nothing.
Standard
Most popularEverything you need to run your gas business.
£9.99/month
Everything in Basic, plus:
- Unlimited CP12 and CP17 certificates
- AI Snap & Fill nameplate scanner
- Job reports for any visit
- Automated renewal reminders
- Certificate verification with QR
- Priority email support
Start free trial
14 days free. Cancel before it ends to pay nothing.
Prices exclude VAT where applicable. Your card is saved at signup and never charged during the 14-day trial. When it ends you choose whether to subscribe.
Reviews
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Sign in and leave a review New here? Start your free trial first.No. Gas Safe registers engineers and businesses, it does not approve software. Mediumlink UK Ltd is a Gas Safe registered business, and the CP12 and CP17 documents the software produces carry the fields required under the Gas Safety (Installation and Use) Regulations 1998. Responsibility for the inspection and for what goes on the certificate rests with the registered engineer carrying it out.
Your data is encrypted in transit and at rest. Hosting sits in the EU and UK regions of our cloud providers, Supabase and Vercel. We never sell data to anyone. The full privacy policy is at mediumlink.uk/privacy.
Yes, with one click in the app. Cancellation takes effect at the end of your current billing period. No phone calls, no retention agents, no fees.
Basic at £3.99 a month covers invoices, quotes and job sheets with the shared customer list. Standard at £9.99 a month adds CP12 and CP17 certificates, job reports and the AI Snap & Fill scanner. Both include offline working and your branded PDFs. Start on either plan and switch any time from inside the app.
No. It is included in the Standard subscription with no per-scan fee.
Yes. Every PDF carries a verification code and a QR code. The landlord opens the link and sees the certificate's status and issue date. No personal data is exposed and no login is needed.
You can add customers as you go, and the app remembers their details so the next certificate at that property is one tap. Bulk CSV import is on the roadmap. Email [email protected] and we can help.
Both. Medium Link is a web app. Open app.mediumlink.uk in Chrome on Android or Safari on iOS, tap Add to Home Screen, and it launches like a native app.
Sign up and you get full access for 14 days. We ask for a card so you can subscribe in one tap later, and we never charge it during the trial. When the 14 days are up you decide whether to pay. Walk away and nothing is taken.
No. There is no subscription behind the trial, so there is nothing that could bill you. On day 15 you land on a subscribe screen and choose. If you do subscribe and change your mind, ask for a full refund within 24 hours of any payment, from the Subscription tab in the app.
Your next CP12 is minutes away. Start free. See the difference yourself.
14 days free. No automatic charge when it ends, so walk away and pay nothing.
Start your free trial