App-Entwicklung: iOS & Android from One Codebase

iOS & Android fromOne Codebase

Maintaining two separate codebases for iOS and Android means double the effort, double the bug fixes, and a permanent risk of feature divergence. We structure cross-platform projects so that platform-specific code is clearly isolated and the majority of logic is shared – ensuring consistent features on both platforms without double the maintenance burden.

Challenges you'll recognise

  • Your iOS and Android apps have divergent feature states – Android users have been missing features that iOS has for months.
  • Every bug fix needs to be implemented and tested twice – your team loses half its capacity to synchronisation.
  • Platform-specific code is not isolated, and changes to one platform unintentionally break the other.

Shared Code Strategy

Not everything can be shared – and not everything should be. We define upfront what is genuinely platform-agnostic (business logic, state management, network layer) and what needs platform-specific implementation. This clear separation keeps the code maintainable and prevents workarounds that become problems later.

Platform Abstraction

Device access like camera, biometrics, or notifications is encapsulated behind abstraction layers. The app logic calls a unified interface; the platform-specific implementation stays hidden underneath. This simplifies testing and isolates platform updates.

Consistent Features

When iOS and Android are built from a shared codebase, all users receive the same features simultaneously – no iOS feature that Android users miss for months. We set up CI/CD pipelines that build and test both platforms simultaneously on every release.

Platform Conventions

A shared codebase does not mean identical UX. iOS users expect different navigation and gestures than Android users. We implement platform-specific UX details selectively where they improve the user experience – while the app logic underneath stays shared.

Good to know

  • 70–90% Shared Logic

    In well-structured cross-platform apps, the majority of business logic, state management, and network layer is shared between iOS and Android. This reduces maintenance overhead considerably.

  • Clear Platform Boundaries

    Platform-specific code is explicitly isolated, not scattered. This makes OS updates and platform-specific feature additions manageable without destabilising the shared core.

  • Simultaneous Releases

    With a shared codebase and unified CI/CD pipeline, iOS and Android updates go live simultaneously – neither platform falls behind.

Frequently asked questions

What proportion of code can realistically be shared?
In well-structured cross-platform apps, typically 70–90% of the logic. UI code varies more because platform-specific conventions should be respected. The exact proportion depends on the app.
How is it ensured that both platforms truly have the same feature state?
Through shared tests that run cross-platform and CI/CD pipelines that build both platforms on every commit. Features in the shared codebase are by definition available on both platforms.
What happens when one platform gets a new OS feature?
Platform-specific code is isolated, so iOS-specific adjustments do not affect Android. We can add platform-specific features without destabilising the shared codebase.

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Why nextlevels

Success you can measure

With us you're always one step ahead technologically and tap directly into our extensive app development expertise. We take a close look at your app idea, identify key success factors and create tailor-made applications. Your visions and goals are at the heart of our joint project work.

  1. Expert knowledge in app technologies

    React Native, Flutter, native iOS and Android — we pick the stack to fit your project, not our preference.

  2. Comprehensive user experience know-how

    Intuitive operation and seamless interactions decide ratings and how long users stay in the app.

  3. Proven track record

    Published apps in the App Store and Play Store — from MVP to mature platform.

  4. Versatile team

    Concept, design, development and backend from one hand — no friction at the interfaces.

  5. Long-term partnerships

    We stay after launch and keep evolving your app with maintenance and updates.

READY FOR YOUR APP THAT SETS NEW STANDARDS?

Whether you want to optimize an existing app or bring a new vision to life – we'd love to meet you. A no-obligation conversation is always a great start.

Profile picture of Paul Kalisch, Executive Partner
Paul Kalisch
Executive Partner

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