What it means
Traditionally, an iOS app and an Android app were built separately, in different languages. Cross-platform frameworks such as React Native and Flutter let developers write most of the app once and ship it to both platforms.
The result is usually faster and cheaper to build and maintain. Native development can still be the better choice for apps that depend heavily on the latest device features or need maximum performance.
Why it matters for a business
For most business apps, such as booking, field service or customer portals, cross-platform development gives both platforms for close to the cost of one. That matters when budgets are limited and both iPhone and Android users must be served.
A business example
Things to watch
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Check that needed device features are supported.
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Test on real iPhone and Android devices.
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Plan for app store reviews and updates.
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Budget time for app store rules, privacy labels and review delays.
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Keep one person responsible for testing each release on both platforms.