RealmJS

RealmJS contains Realm bindings for integrating with mobile apps built using javascript frameworks such as ReactNative and PhoneGap.

ReactNative Setup

Create a new ReactNative project react-native init <project-name> and open the generated XCode project.
Drag RealmJS.xcodeproj into the Libraries folder in your project.
In the target for your application, add libRealmReact.a in the Link Binary with Library build phase.
Use Realm in your app.