After the launchscreen, but before app is loaded, there\'s a \"Loading from pre-bundled file\" message that appears at the top of the screen for just a few hundred milliseconds.
Also you can run this
react-native bundle --entry-file index.ios.js --platform ios --dev false --bundle-output ios/main.jsbundle --assets-dest ios
And then change in xcode class AppDelegate.m
//jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];
jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];