Starting with a well-defined product objective and awareness of device fragmentation, define the MVP, choose an architectural approach, and map out key user flows early to keep the initial release focused and minimize rework as the app expands.

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