The Doppelgänger Dilemma: Why Your Mobile Apps Look Alike but Act Like Strangers
Most mobile teams don’t ship one app. They ship two apps that slowly disagree. A validation rule changes on Android. iOS ships it two sprints later. Weeks afterward, users report “random failures” but nothing is actually broken. The platforms simply made different decisions. I call this the Doppelgänger Dilemma: apps that look identical in the store, yet behave like strangers in production. In mobile engineering, the hardest problem is not performance or UI. ...