01Compare the task before comparing frameworks
Start with the product journey, integrations and device capabilities. A shared codebase may suit an app with similar workflows on both platforms. It does not remove the need to understand each platform’s permissions, interaction conventions, release process and accessibility behaviour.
Native development may be appropriate when a product depends heavily on platform-specific features or specialised performance. A responsive website may be sufficient when the main task is occasional browsing or enquiry. The discovery decision should explain why the chosen approach fits the business rather than follow a framework preference.
02Identify where sharing stops
Document the parts expected to be shared and those needing platform-specific work. Examples include notifications, payments, camera access, background processing and integrations with device services. Check the maintenance state of libraries before relying on them for a critical feature.
An early technical experiment can test the riskiest dependency. That is more useful than a complete visual prototype that assumes the difficult device behaviour will work later. Include the result of that experiment in the implementation decision.
03Test both products
Sharing code does not mean one platform can stand in for the other during acceptance testing. Test the supported devices, permissions, accessibility, account recovery and connection failures on both iOS and Android. The release plan should identify separate store listings, account access and platform policy checks.
Keep test data and environments controlled. Confirm how mobile clients interact with server versions so a server update does not unexpectedly break people using an older app release.