I have to build a relatively big cross-platform (iOS & Android) application within 3 months.
So far when it comes to React Native I only have experience with
You can use Ex-Navigation which is built on top of
NavigationExperimental and supports both iOS and Android. Plus, it has a route navigation system and correctly supports the Android back button.
If you want to keep using the
react-native-navigator-wrapper which is a simple wrapper around the
Navigator API that supports the most common navigation patterns like push, pop and modals.