Mobile App Development

Cross-Platform App Development

iOS + Android from one codebase using React Native or Flutter — without the cross-platform tax.

Timeline
14–22 weeks for v1
Engagement
Senior, embedded
Pricing
Outcome-based
Discipline
Mobile App Development

⏚ Summary

What this engagement is, plainly.

Cross-platform mobile pays back when you respect its limits. We ship React Native and Flutter apps that feel native, perform near-native, and don't trap you in framework-specific debt.

Problems we solve

  • You want one team shipping both platforms but past cross-platform attempts felt cheap on iOS.

  • Performance on lower-end Android devices is killing engagement.

  • Native bridge code has accumulated and no one's sure what's still needed.

⏚ Approach

How we run this engagement.

  1. 01Phase

    Architecture for both

    We design module boundaries that map cleanly to both platforms. Native code is invoked deliberately, not by default.

  2. 02Phase

    Platform feel

    iOS feels like iOS; Android feels like Android. Different transitions, different defaults, shared business logic.

  3. 03Phase

    Performance budget

    Frame timing, cold-start, and memory budgets are locked per device class. We test on real low-end devices, not simulators.

⏚ Deliverables

What you get, signed off.

  • iOS + Android apps from one codebase

  • Native module architecture for platform-specific surfaces

  • CI/CD pipeline (EAS, Fastlane)

  • Store submission + review playbook

  • Crash + performance monitoring

⏚ Stack we typically use

Tools, not religion.

We pick on workload and team shape, not on fashion. Anything below is a default — swappable when your context demands.

  • React Native
  • Expo
  • Flutter
  • TypeScript
  • Reanimated
  • Sentry
  • Fastlane

Outcome

An iOS + Android app shipped from one codebase that feels native on both, performs on real devices, and your team can extend without specialized hires per platform.

⏚ Frequently Asked

About this service, specifically.

⏚ Engagement Initiation

Have a hard problem worth doing once, well?

We take a small number of engagements per quarter. If your program needs serious operators, we'd like to hear about it.

Start a Projecthello@xpansionit.com

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