v1build
App development for startups and agencies

Properly built. Agreed in writing.

A senior engineering team that works London hours, quotes one fixed price before anything starts, and sticks to it. Your first version, live in 21 days.

v1buildSample proposal

Booking app for Harbour & Co.

✓ Customer accounts and bookings✓ Staff calendar and reminders✓ Card payments✓ AI reply assistant
Fixed price · 21 days£7,500
J. HarbourSigned

Built around how you work.

Your hours, not ours

We’re live from 9 am to 1.30 pm UK time, every working day. Questions are answered before you head home.

No surprises on cost

One fixed price in a plain-English agreement. Any change is quoted and agreed before work begins.

Data handled carefully

Your customers’ data stays in your systems. We sign a UK GDPR data processing agreement before we start.

For design and marketing agencies

Your client. Your brand. Our engineers.

Sell the app your client is asking for. We build it quietly under your name, at a trade price that leaves you a healthy margin.

See partner terms
Behind the scenesv1build engineers
What your client seesYour AgencyDelivered on time, under your brand.

One price, agreed up front.

Invoiced in three stages. For UK VAT-registered businesses, VAT is accounted for under the reverse charge.

First version in 21 daysAccounts, core features, one AI feature, launch£4.5k – £8.5k
Prototype to productionFor apps built with AI toolsfrom £2,250
AI assistant for your teamHosted in your own accountfrom £1k
Ongoing developmentMonthly, 30 days’ noticefrom £3k/mo

Fair questions.

Can we speak to someone you’ve worked with?

Yes. Ask on the call and we’ll introduce you to a founder we’ve built for, with their permission.

How does VAT work?

We invoice from outside the UK. If you’re VAT-registered, you account for VAT under the reverse charge. Your accountant will confirm.

What if we change our minds mid-build?

We price the change within a working day. Nothing new starts until you’ve agreed it in writing.

Shall we have a chat?

A written scope and fixed price follow within one working day.