A developer's experience building three Android TV apps revealed fundamental differences between mobile and TV development that many teams overlook. The project began with assumptions that Leanback library integration would handle TV-specific requirements while reusing existing mobile code, but this approach quickly failed. What seemed like isolated bugs turned out to be symptoms of treating TV as just a larger mobile screen.

Within weeks, the team encountered persistent issues: focus navigation jumping unpredictably, text becoming unreadable from typical viewing distances, and performance problems that made the app feel sluggish. These weren't random failures but manifestations of deeper architectural mismatches. Mobile development patterns that work well with touch input—such as dense interfaces and implicit focus management—break down completely when users navigate with remote controls from across the room.

The most critical insight was that TV apps require fundamentally different design thinking. Navigation clarity becomes paramount since remote input is discrete and intentional, unlike touch's high-bandwidth interaction. Hardware limitations on most TV devices mean performance optimizations that seem minor on phones become critical bottlenecks. The developer experience also changes dramatically, with slower feedback loops and state-dependent bugs that only appear during actual TV usage. Teams that fail to recognize these differences inevitably ship apps that technically work but frustrate users.