Native Android Development in Kotlin & Compose

Native Android is ideal when your app requires deep Android platform integration - Nearby API, Android Auto, Wear OS, custom camera HAL access, or complex foreground services. It's also the right choice when your existing team is Kotlin-native or when Android-first market strategy justifies the focus. For most two-platform apps, React Native or Flutter cover the same ground at lower cost.

All new projects use Jetpack Compose, Google's declarative UI toolkit. Compose eliminates XML inflation, simplifies animations, and is the direction of all new Jetpack investment. We migrate legacy XML-based projects incrementally using the ComposeView interop wrapper.

Android runs on thousands of device models with varying screen sizes, GPU capabilities, and OS versions. We test on a matrix of physical and emulated devices via Firebase Test Lab, use adaptive layouts with WindowSizeClass, set a minimum SDK that covers 95%+ of active devices, and apply manufacturer-specific workarounds for known OEM quirks.

We follow Google's recommended MVVM + Repository pattern: Composable screens observe StateFlow from ViewModels, ViewModels call UseCases, UseCases coordinate Repositories, and Repositories abstract local (Room) and remote (Retrofit) data sources. Hilt provides compile-time verified dependency injection throughout.

Yes. We build Android TV Leanback apps, Wear OS tile and complication experiences, and large-screen adaptive layouts for tablets using WindowSizeClass and SlidingPaneLayout. Each form factor requires distinct UX - we do not simply scale phone layouts.

We use WorkManager for deferrable background work, Foreground Services for user-aware long-running tasks (e.g., media playback, location tracking), and AlarmManager only when exact timing is required. We follow Android's battery optimization best practices to avoid Doze and App Standby restrictions.

Yes. We implement Google Play Billing Library for in-app purchases and subscriptions, including purchase verification on a backend server to prevent client-side spoofing. We also handle subscription upgrades, downgrades, grace periods, and Google Play promotional codes.

Testing layers include JUnit 5 + Mockito unit tests for ViewModels and business logic, Compose testing APIs for UI component tests, and Espresso or UI Automator for full end-to-end flows. We run the test suite on Firebase Test Lab using a device matrix that covers top Android devices and OS versions.

We integrate Firebase Cloud Messaging (FCM) for push notifications, configuring notification channels, priority levels, and large icon/big picture styles. For notification grouping, inline replies, and rich media, we implement custom NotificationCompat builders that work across Android 8-15.

Yes. We perform incremental Java-to-Kotlin migrations using Android Studio's automated converter as a starting point, followed by idiomatic refactoring to coroutines, data classes, and null safety. We typically migrate file by file alongside feature development to avoid a big-bang rewrite.

An Android MVP takes 6-10 weeks. A full consumer app takes 3-6 months. Apps with complex background services, proprietary hardware SDKs, or Wear OS/TV targets take longer. We scope timelines after a structured discovery session.

An Android MVP with accounts, payments, a content layer and an admin panel is 800-1,410 hours, or $24,000-$43,000 at our rate card. Add the third-party systems you already pay for and it is 890-1,640 hours, or $27,000-$50,000. A full consumer app with chat, real-time and offline sync on top is 1,240-2,310 hours, or $38,000-$70,000. Costs move with feature depth, the number of form factors and backend complexity. Price your own module set at kultrix.com/cost-calculator.