The invoice app we built because ours kept breaking

Three years ago, I was sat in a van outside a client's house in Coventry. The electrician running the job - let's call him Dave - was showing me his invoicing setup. A smartphone, a notebook, and an email address he checked once a week. When I asked why he wasn't using the invoicing apps everyone kept recommending, he looked at me like I'd suggested he learn Latin. "Takes too long," he said. "And they all want me to pay card fees on top." That conversation stuck with me. It felt like everyone building invoicing software had forgotten who actually sends invoices for a living.

The problem nobody talks about: it costs too much to get paid

Here's a number that haunts me. On a £500 invoice paid by card, the processor takes £12.50. Sometimes more. The tradesperson ends up with £487.50, and the client has to use their card, which they may not want to do for a job at their home. We built Invoicr around a single idea: what if invoices were paid the way most business actually happens in the UK? Bank to bank. No card company in the middle. Open banking has been available for years, but no invoicing app had made it the headline feature. On that same £500 invoice through Invoicr, the fee is roughly £4. The maths are brutal enough in trades without losing 2.5 per cent of every payment to Visa's infrastructure. When we launched, I genuinely wasn't sure if people would trust it. But the first week, we had plumbers and gardeners signing up because the math made sense. They weren't paying for a feature they'd never use. They were paying to keep more of what their clients owed them.

Mobile first, because your office is in your pocket

Dave from Coventry wasn't unusual. Most of the tradespeople we spoke to work from vans, job sites, and customer homes. They don't have a desk. They don't have "business hours." Every app we looked at treated mobile as an afterthought. They were desktop designs squeezed into a phone screen. So we did the opposite. Invoicr is iOS native and built for a phone first. Not responsive web. Not a wrapper. A real app that works the way someone actually works when they're on site. The client portal works via a secret URL token. No username, no password recovery, no friction. A client gets a link, they open it, they see their invoice and can pay you directly from their bank. From the job site, you can send that link via WhatsApp if they need it. It takes maybe thirty seconds. That simplicity is the whole point. We're not building for procurement departments. We're building for people who need to invoice fast and get paid faster, and they're doing it between jobs.

VAT and CIS compliance shouldn't be a separate product

One of the trickiest decisions we made was keeping the Free tier genuinely free. Five invoices a month, three customers, all the core payment stuff - no card required. But we knew that wouldn't work for everyone. Some tradespeople hit that limit within a week. Builders taking multiple jobs a month, electricians with regular clients, gardeners with seasonal rushes. So the Pro tier unlocks unlimited invoices, automated payment reminders, and the ability to send quotes. That's where most tradespeople live. But we also realised something else: if you're serious enough to need unlimited invoices, you probably need to handle VAT or Construction Industry Scheme deductions. Not every tradespeople does, but many do. And the accountants we spoke to - the ones who actually work with tradespeople - wanted a way to export the data cleanly. That's what the Business tier does. It adds team seats so you can hand off invoicing to someone else if you grow, VAT compliance features, CIS deduction handling, and a clean export format for your accountant. We built it because real tradespeople asked for it, not because we wanted another subscription tier.

The reminders that don't sound angry

Late payments are corrosive. They break cash flow for small operators. But the moment you automate payment reminders, you have to think about tone. Most invoicing software sends reminders that sound like they were written by a debt collector. Urgent language. Threats lurking in the subtext. That's not Dave's style, and it probably isn't yours either. So our automated reminders are polite. They remind the client, they reference the invoice, they include the payment link. They're the kind of reminder you'd be comfortable having your name on. Because you are. That message comes from you, even though you set it up once and it runs automatically. When someone told us, "I don't feel bad sending that reminder," we knew we'd got it right.

Building for the UK, not pretending the US market is everyone

This is small but important. We're not American software with a UK checkbox. Invoicr is built for UK tax law, UK banking, and UK tradespeople. Open banking integration only works in the UK. VAT and CIS compliance features don't translate to other countries. The cost of the payment method is structured around British banking infrastructure. We made choices that only make sense here, which means we can't easily expand into Australia or Canada or anywhere else. We don't care about that. We care about doing one thing properly. It means we understand what a plumber in Manchester actually needs, not what a venture capital fund thinks a global invoicing platform should do. When a regulation changes, we change with it. When a tradespeople asks why something works a certain way, the answer is usually "because that's how the UK works." That focus is in every decision.

Three years on from that conversation in the van, Invoicr's here. Free for your first few invoices. Designed for the work you actually do. But the real question isn't whether an app can handle invoices - most of them can. It's whether it respects how you work, and whether it saves you money instead of taking it. Does yours do that?