My production app suddenly exits on both iOS and Android. The shutdowns feel random at first glance, yet they almost always happen while a user is engaging with certain feature screens rather than on launch. Because of that I’m convinced the problem sits somewhere in the code or resources tied to those feature flows, not in the general app bootstrap. I can provide the full project source, recent TestFlight and Play-Store builds, and the stack traces already captured with Firebase Crashlytics. What I need is a clean, reproducible analysis of the fault, a code-level fix, and fresh builds that run crash-free under normal usage. Please include any unit or instrumentation tests you add so I can verify stability before publishing the updated versions. Your work is finished when: • The app no longer crashes while repeatedly using the affected features on current iOS and Android OS versions. • New builds are delivered with version numbers bumped and ready for submission. • A concise summary of the root cause and the exact changes made is handed over so I can track future regressions. If you’re comfortable diving into mobile crash logs, profiling memory/threads, and patching native or cross-platform codebases, you’ll feel right at home here.