App development agency · London

London app development that moves your business forward.

We design, build and launch native iOS and Android apps for London startups and growing businesses. Senior team, fixed-scope quotes, no jargon.

Fixed-scopequotes, no surprises
Weeklydemos and updates
100%code ownership
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Push notifications

Android release

Analytics dashboard

✓

App Store approvediOS 1.0 is live
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Sprint demoFriday · 14:00
Native technology we build with

  • Swift
  • SwiftUI
  • Kotlin
  • Jetpack Compose
  • Node.js
  • Firebase
  • AWS
What we do

Everything you need to launch and grow an app

From a first MVP to a business-critical platform, one team covers strategy, design, engineering and support.

Native iOS and Android apps

Fully native apps for iPhone, iPad and Android, engineered for speed, security and a smooth App Store and Google Play launch.

  • Swift
  • SwiftUI
  • Kotlin
  • Jetpack Compose
NativeBuilt for each platform, for the best performance and experience
100%Source code and IP owned by you

MVPs for startups

Launch a focused, investor-ready native MVP, then iterate on real user data.

Backend and admin dashboard

A secure cloud backend and management dashboard to run your app: users, content, orders and analytics.

UX and UI design

Research-led journeys, wireframes and prototypes that make your app effortless to use, following Apple and Google design guidelines.

APIs and integrations

Secure cloud backends connected to your CRM, payments and the tools you already use.

Support and maintenance

Monitoring, OS updates and new features after launch, so your app keeps getting better.

Why Digital Lime Green

A partner, not just a supplier

We work as an extension of your team, with senior people from day one and complete transparency on progress and budget.

Fixed-scope pricing

A clear proposal and price before we start, so you can plan with confidence.

Weekly demos

You see working software every sprint, not just at the end of the project.

You own everything

Full source code and intellectual property are yours on final payment.

Senior team

Experienced designers and engineers, with one point of contact throughout.

How we work

How we take you from idea to launch

A typical MVP timeline. Larger products are delivered in phases.

Weeks 1–2

Discover

Workshops to define your users, goals and scope, ending in a clear fixed-scope proposal.

Weeks 2–4

Design

User journeys and clickable prototypes, tested before a line of code is written.

Weeks 4–12

Build

Two-week sprints with a working demo at the end of every one.

Week 12+

Launch and grow

App Store and Google Play release, then analytics, support and new features.

Who we work with

Apps for ambitious London businesses

Startups validating new products and established SMEs modernising how they work.

  • Startups and scale-ups
  • Professional services
  • Property
  • Health and wellbeing
  • Retail and e-commerce
  • Hospitality
  • Education
  • Logistics
  • Fitness
  • Financial services
FAQs

Questions, answered

Everything you need to know before starting an app project with us.

How much does app development cost in London?

It depends on features, platforms and integrations. After a short discovery call we give you a fixed-scope quote, so there are no surprises. Starting with a focused MVP keeps the initial investment low.

How long does it take to build an app?

Most native MVPs take around 10 to 14 weeks from discovery to launch. Larger products are delivered in phases so you can launch sooner and add features over time.

Why do you build native apps?

Native apps, built in Swift for iPhone and Kotlin for Android, deliver the best performance, the smoothest user experience and full access to device features such as the camera, location, payments and notifications.

Do you work with startups and established businesses?

Yes. We help founders scope and launch MVPs, and we help established SMEs build custom apps and management dashboards that streamline how they work.

Who owns the app and source code?

You do. On final payment you own the intellectual property and full source code for your app.

Do you only work with London businesses?

We are London-focused and work with businesses across Greater London and the rest of the UK, both remotely and in person.

Have an app idea? Let’s talk.

Book a free 15-minute call with our London team. Honest advice on scope, platform and budget, with no obligation.