A simple HN React Native client. It currently only supports Android. It should work on iOS, but I haven't tested it.
First, make sure you have npm and node (>4.0) installed. Next, install the react developer tools.
npm install -g react-native-cli
Then clone the repo and download the dependancies.
git clone https://github.com/nvladimiroff/HNReactNative.git
cd HNReactNative
npm install
Then finally, make sure $ANDROID_HOME is set and an emulator is running and run:
react-native run-android
You can then press the menu button on the emulator to get to the debug options which let you set up things like automatic code reloading.
See Facebook's getting started or android setup pages for more details.