Let’s build your app
CROSS-PLATFORM APP DEVELOPMENT

One build.
Both platforms.

Cross platform app development UK businesses choose when they need iOS and Android live from day one, without paying for two separate native builds. Our Launch package, from £999, builds both from a single shared codebase.

WHAT’S INCLUDED

Everything You Need To
Launch On Both Platforms

  1. iOS and Android from one shared codebase

  2. 8–12 screens

  3. Sign-in and database included

  4. One standard API integration

  5. Basic push notifications

  6. 2 revision rounds, timeline agreed upfront

THE RIGHT FIT

Designed For Founders
Who Need Both Stores.

Businesses who already know both platforms matter, whether that’s because your customer base is split, or because you want to launch on both from day one rather than adding a second platform later.

STANDARD SERVICE TIER

Most cross-platform apps start with Launch, from £999. If you only need one platform to prove the idea first, Starter from £500 is usually the better fit.

View full pricing & packages

How we build it

We use modern cross-platform frameworks, commonly React Native or Flutter depending on your app’s needs, to build one codebase that runs natively on both iOS and Android. The result behaves and feels native on each platform, it isn’t a wrapped website.

EXPLORE MORE

Supporting Your
Product At Every Stage.

First version

MVP App Development

A focused, production-ready first version built around one core workflow to prove demand fast.

Learn more
Design first

App UI/UX Design

User journeys, wireframes and interactive Figma prototypes that make your app clear and ready to build.

Learn more
Portfolio & Proof

Our Work

Explore real case studies, live client apps, and proof of how fast ideas turn into tangible code at Appin500.

View case studies
PRICING

A small start A plan for what’s next.

Choose your starting point. We’ll confirm the right fit before you commit.

Starter

One great idea. One focused first version.

£500


  • 3–5 screens, one core function
  • iOS or Android
  • Simple database, where needed
  • Clean UI & source code handover
  • 1 revision round
  • 7–14 day target after scope approval

Custom

For ideas with a little more ambition.

£1,999+


  • Scope tailored to your product
  • Payments or AI features
  • Admin dashboard options
  • Multiple user roles
  • Marketplace & advanced integrations
  • Written quote & delivery plan
GOOD QUESTIONS

Before you Take a Leap

Will a cross-platform app feel native?

Yes. Frameworks like React Native and Flutter render native interface components on each platform, so the experience matches what iOS and Android users expect.

Is cross-platform cheaper than building both natively?

Usually, yes, because you’re maintaining one codebase instead of two. That’s the main reason our Launch package leads with this approach.

Can I start cross-platform and add features later?

Yes. We can quote separately for additional features, integrations and support as your app grows past the initial Launch scope.

LET’S MAKE SOMETHING REAL

That app idea? Let’s hear it.

You don’t need a perfect brief. Just tell us what you have in mind — we’ll help you find the right first step.

  • No obligation
  • No payment to enquire
  • Honest scope review
Your starting point

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