A cross-platform app is a mobile (or desktop) application built from a single codebase that runs on multiple operating systems, most commonly Android and iOS, using frameworks such as Flutter or React Native.
Why it matters
- Lower cost: one team and one codebase instead of two
- Faster launch: ship on both stores at the same time
- Consistent experience: the same features and design across devices
- Easier maintenance: fix once, deploy everywhere
Cross-platform vs native
| Cross-platform | Native (Kotlin/Swift) | |
|---|---|---|
| Codebases | One | Two |
| Cost and time | Lower, faster | Higher, slower |
| Performance | Very good for most apps | Best |
| Device features | Via plugins and modules | Full, immediate access |
Native still wins for performance-critical apps (games, heavy media, AR) and deep OS integrations.
In RapBooster
RapBooster's Professional tier (from ₹5,00,000, excl. GST) delivers Android + iOS, typically cross-platform, with a custom backend and admin, a project manager and 90 days of support.
Example
A grocery delivery startup builds its customer app in Flutter and launches on Android and iOS the same week, then adds a web ordering portal that reuses parts of the code.
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