App development · London

App development for London startups, properly built.

A senior engineering team working London hours every morning, quoting one fixed price in pounds before anything starts, and putting the code in your accounts from day one.

First version
£4.5k – £8.5k
Mobile app
£8.5k – £22k
Live overlap
9 am – 1.30 pm
Agreement
Plain English, fixed

Who it’s built for.

  • London founders who need a working product, not a long discovery phase
  • Design and marketing agencies that sell apps under their own brand
  • Scale-ups with a backlog bigger than their team

What’s included

In scope

  • Accounts, roles and an admin panel
  • Your three core features
  • One AI feature with tests
  • Deployment and two weeks of fixes
  • A UK GDPR data processing agreement

Available as add-ons

  • Native apps in the first sprint
  • More than two integrations

How it runs, week by week.

Day 0

Call

Twenty-five minutes. A written scope and fixed price within one working day.

Week 1

Foundations

Accounts and data model on a private link.

Week 2

Features

Core flows working, tested by you.

Week 3

Launch

Tested, secured and live.

Prices for London clients

First version in 21 days £4.5k – £8.5k Most land in the middle of the range.
Prototype to production from £2,250 For apps built with AI tools.
Ongoing development from £3k/mo 30 days’ notice.
What moves the price
FactorEffect on price
More than one type of userAdds £750 – £1,500
Integrations beyond twoAdds £350 – £1,000 each
Finished designsLowers the price

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

Questions, answered.

Can we speak to someone you’ve worked with?

Yes. Ask on the call and we’ll introduce you, 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.

Do you work white-label for agencies?

Yes. We build under your brand at a trade price.

Shall we have a chat?

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

Prefer email? hello@v1build.com