Zerta

Zerta did not start in an office. It started in the evenings, after a full day on site and when small children were settled in their beds.

We started out from the frustrations of a small, family-run, solo-electrician electrical firm. Like a lot of micro businesses, our workload changes constantly. Some months are flat out, others are quieter. Jobs vary in size, and the pace has to flex around real life, especially childcare, school runs, and the realities of being both the electrician on the tools as well as the admin department.

No matter how the month looks, one thing never changes. Every job still needs to be certified properly, and every certificate still needs to look professional.

For a long time, that meant doing the actual electrical work during the day, then sitting down in the evenings to deal with paperwork. Booting up a laptop just to open Adobe InDesign; tweaking layouts; exporting PDFs. All after a full day on site.

We looked at what else was available and ran into the same frustrations again and again.

Some systems rely on bulk-buy tokens, which only really make sense if you are issuing certificates all the time. Other tools are wrapped up in large trade platforms that want to manage your entire business, from invoicing to scheduling to customer tracking and job bookings on its calendar, when all you actually need is a reliable way to produce certificates. Most of them came with monthly subscriptions that cut into profits, even in months where you might not issue a single certificate because it's the summer holidays and kids are off school so the pace of work has to drop down.

None of it felt built for someone working on their own, juggling site work, family life, and admin in the gaps.

What we really wanted was simple.

A way to open our phone on site, start recording job details as we go, and not have to know everything upfront. Something that worked even with poor signal. Something that let us generate a clean, compliant PDF before leaving the job if needed. Something that did not lock us into subscriptions, tokens, or enterprise-level pricing that made no sense for how we actually work.

We could not find it.

So we built it.

Zerta is the app we went looking for and wished already existed. A no-fuss, offline-first mobile app that helps you create, store, and share BS 7671 certificates properly, without the usual hassle. It remembers your details, reduces repetitive typing, and produces professional PDFs that you would be happy to hand to a client.

It is built for solo electricians and small firms because that is exactly who built it.

If you are trying to balance real life with doing the job properly, we hope Zerta makes that part of your work a little easier.

Built in the UK for small firms, born out of one family’s experience of running a solo-electrician firm.