Multiline BlockQuote Is your app crashing on TestFlight? What do you do if your app is working just fine locally but crashing on TestFlight or the App Store. Here’s a quick checklist you can go through to resolve the problem Try building and testing the app in RELEASE mode locally. Check if third-party dependencies work with RELEASE mode. Check compiler optimizations in Xcode. Check for deprecated unused objects. Try disabling bit code if necessary. Try recompiling and archiving the app with the latest version of Xcode. Try resubmitting the app. Time to cry for help from Apple.