Update README.md

README.md

@@ -2,15 +2,18 @@
 
 A Dart wrapper for [Firebase](https://www.firebase.com).
 
-This package uses `dart:js` to wrap functionality provided by `firebase.js`
+This package contains two implementations of the same ```Firebase``` Dart API:
+* The ```JsFirebase``` implementation uses `dart:js` to wrap functionality provided by `firebase.js`
 in Dart classes.
+* The ```MojoFirebase``` implementation uses [Mojo](https://github.com/domokit/mojo) to wrap functionality provided by Firebase iOS and Android SDKs.
 
 #### Installing
 
 Follow the instructions on the [pub page](http://pub.dartlang.org/packages/firebase#installing).
 
-**The firebase.js library MUST be included for the wrapper to work**:
+**The firebase.js library MUST be included for the JavaScript wrapper to work**:
 
 ```html
 <script src="https://cdn.firebase.com/js/client/2.3.2/firebase.js"></script>
 ```
+