Android is the biggest mobile platform, and that is the problem and the opportunity. As of November 2025, Android holds about  71.9 %  of the worldwide mobile OS market share.   And even something as basic as screen resolution is spr ead out. For November 2025,  360x800  alone is about  10.51 % , which means no single  size tru ly “wins.”  If you  are into Android app,  fragmentation is not a side quest. It decides your crash rate, your store ratings, and how expensive support gets after launch.    This guide shows how to design and ship Android apps that behave well across devices that look nothing alike.   Why Android Fragmentation Breaks Good Apps   Fragmentation is not just “too many phones.” It is a stack of differences that hit your UI, performance, and stability at the same time.   Here are the big sources of  real-world  pain:   Screen variety : phones, foldables, tablets, Chr...