How I Debugged a Persistent Mobile App Crash and Fixed It

As a mobile developer, I’ve faced countless bugs. Some are minor UI glitches, while others are app-crashing nightmares that leave users frustrated. I want to share one such experience where a seemingly simple bug in a mobile app almost derailed an entire release—and how I fixed it. The Bug: App Crashes on Launch for Some Users A few months ago, I was working on a Flutter-based e-commerce app. During testing, everything worked fine on simulators and my devices—but when beta users tried the app on certain Android devices, it crashed immediately after tapping the icon. No error messages appeared on the home screen, and the crash reports were inconsistent—sometimes only appearing on devices running Android 12+. Step 1: Reproduce the Issue The first step in any bug fix is reproducing the problem reliably. I set up multiple emulators with the same Android versions as the affected devices. Installed the app on real devices running Android 12 and 13. Observed the crash pattern: it only occurre