UK Web and Mobile App Development Agency

Web and Mobile Apps Built Properly, Delivered Fast

We're a UK-registered web and mobile app development agency. We build AI-powered web apps and mobile apps for SaaS founders, law firms, estate agents and accounting firms. Fixed-price sprints. Weekly demos. No surprises.

  • ✓ UK Registered Company
  • ✓ Fixed-Price Sprints from £8k
  • ✓ Weekly Working Demos
Built for outcomes

Delivery model

Fixed-price sprints

Clear scope, weekly working demos, and no dead time between decisions and delivery.

Weekly visibility

100%

Working software shown every week.

Average time to MVP

8 weeks

Fast enough to launch without rushing the foundations.

Trusted by UK businesses and founders

Customer brand
Customer brand
Customer brand
Customer brand
Customer brand
Customer brand
Customer brand
Customer brand
Customer brand
Customer brand

150+

Projects delivered

97%

On-time delivery

8 weeks

Average time to MVP

62%

Work from referrals

Who We Work With

We specialise in four areas. If you're in one of them, we already know your problems well.

For SaaS Founders

01

You have an idea or a product that isn't growing fast enough. We help you build, launch and activate — so users don't just sign up, they stick around.

Learn more about SaaS development →

For Law Firms

02

Client intake still runs on email. Documents still get lost. We build the web apps and AI tools that fix that — without the six-figure price tag.

Learn more about legal web apps →

What We Build

From initial concept to live product — we cover every stage of web and mobile app development.

From validated idea to working product in 8–12 weeks. Fixed price. No scope creep.

Custom web apps built to your exact requirements. Not a template. Not a compromise.

iOS and Android apps that work the way your users expect. Native performance, modern design.

AI built into your product or workflow in 6–10 weeks. Practical use cases, measurable ROI.

Not sure where to start? We'll define your product, validate your assumptions and scope the build — in 7 days.

Already live but users aren't activating? We diagnose the problem and fix it with data.

How It Works

  1. 01

    Start

    Step 1 — Discovery

    We start by understanding your business, your users and what success actually looks like. No assumptions.

  2. 02

    Step

    Step 2 — Design

    Wireframes, prototypes and a UI your users will understand from day one. Signed off before a line of code is written.

  3. 03

    Step

    Step 3 — Build

    Weekly working demos so you see progress every single week. No disappearing for months.

  1. 04

    Step

    Step 4 — Test

    QA across devices, browsers and edge cases before anything goes near your users.

  2. 05

    Finish

    Step 5 — Launch

    We handle the deployment, monitor the go-live and stay available for the first two weeks post-launch.

Ready to Build Something That Works?

Tell us what you're trying to build. We'll tell you how we'd approach it, how long it would take and what it would cost. No commitment required.

Devibi team planning a software project together