Starting with a well-defined product objective and awareness of device fragmentation is key in Android app development. Outlining the MVP, choosing an architecture, and mapping essential user journeys early helps maintain a focused initial release and lowers rework as the app expands.

Once the foundation is set, focus moves to UI consistency, performance, and compatibility across OS versions and screen sizes. Robust state management, prudent networking, and dependable analytics/crash reporting simplify maintenance and iteration after the Google Play launch.