Cross-platform app development

What it is

The architecture behind a two-store product: how much of the app is shared, where a native module is unavoidable, and how one codebase is kept behaving on platforms that disagree about navigation, input and permissions.

Why businesses need it

Two native codebases cost twice the maintenance and drift apart within a year. Shared code only pays when the escape hatches are designed at the start rather than discovered during store submission.

What MIWEBX delivers

• Stack choice made against the product: shared interface, shared logic, or a native shell over shared business code
• One design system mapped onto both platforms' conventions
• Shared state, storage and sync, with per-platform overrides where the OS insists
• Native Swift and Kotlin modules behind a typed bridge for hardware or throughput needs
• One release pipeline producing iOS and Android artefacts from the same commit
• Audit of an existing shared codebase that has quietly started to diverge

Core features

• Platform-specific code isolated into named seams instead of conditionals scattered through screens
• Navigation, back behaviour and keyboard handling tuned per platform from one set of screens
• Business logic written once and tested once, then reused on both stores
• Shared interface components checked on real hardware as well as in simulation
• Over-the-air updates for script and asset changes where the store rules permit them
• Typed contracts between shell and backend, so a change breaks at build time rather than at runtime

Technical capabilities

• Bridge definitions with typed inputs and error paths on both sides of the seam
• Offline state machine on the device with a queue, retry policy and conflict resolution
• Per-platform build flavours: identifiers, signing, entitlements and the manifest permission list
• One notification service in shared code covering APNs and FCM token handling
• Versioned shared component library, so a fix to one screen cannot silently break another
• Release automation producing both store artefacts from one tagged commit
• Feature flags and remote configuration so a risky change ships dark and can be switched off

How we build it

• Decide what is shared and what is native, written down before the first screen.
• Stand up the project: one repository, two build flavours, CI producing both artefacts.
• Build the shared core — state, storage, networking, auth — and test it without an interface.
• Implement screens once, then adjust per-platform behaviour wherever the OS demands it.
• Add a native module only where measurement or hardware justifies carrying one.
• Ship both stores from one release train and keep every divergence documented.

Technology stack

• React Native
• Expo
• TypeScript
• Swift
• Kotlin
• REST APIs
• SQLite
• CI / CD

What you receive

• One repository building both platform artefacts, with the branching and tagging model documented
• iOS and Android release pipelines, including signing and store submission
• A written list of every place the code is platform-specific and the reason
• Native modules with their own tests and upgrade notes
• Shared component library the design system is implemented against

Business benefits

• One team and one backlog instead of two features drifting apart
• A change lands on both stores in the same release
• Native quality where users notice, shared everywhere they do not
• Maintenance cost stays predictable as the product grows