diff --git a/app/build.gradle b/app/build.gradle
index cba7aa3..1ce376c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,6 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
+    productFlavors {
+        free {
+            applicationId = "com.udacity.gradle.builditbigger.free"
+        }
+        paid {
+            applicationId = "com.udacity.gradle.builditbigger.pro"
+        }
+    }
     compileSdkVersion 23
     buildToolsVersion "22.0.1"
 
@@ -21,10 +29,9 @@ android {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    // Added for AdMob
     compile project(':androidjokepresenter')
     compile 'com.android.support:appcompat-v7:23.1.0'
-    compile 'com.google.android.gms:play-services-ads:8.1.0'
+    freeCompile 'com.google.android.gms:play-services-ads:8.3.0'
     compile project(path: ':jokesbackend', configuration: 'android-endpoints')
     compile 'com.android.support:design:23.1.0'
 }
diff --git a/app/src/free/AndroidManifest.xml b/app/src/free/AndroidManifest.xml
new file mode 100644
index 0000000..f88f00d
--- /dev/null
+++ b/app/src/free/AndroidManifest.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.udacity.gradle.builditbigger">
+
+
+    <!-- This meta-data tag is required to use Google Play Services. -->
+    <meta-data
+        android:name="com.google.android.gms.version"
+        android:value="@integer/google_play_services_version" />
+
+    <application>
+        <activity
+            android:name="com.google.android.gms.ads.AdActivity"
+            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
+            android:theme="@android:style/Theme.Translucent" />
+    </application>
+
+</manifest>
diff --git a/app/src/free/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java b/app/src/free/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java
new file mode 100644
index 0000000..aab1709
--- /dev/null
+++ b/app/src/free/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java
@@ -0,0 +1,37 @@
+package com.udacity.gradle.builditbigger;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.RelativeLayout;
+import android.widget.RelativeLayout.LayoutParams;
+
+import com.google.android.gms.ads.AdRequest;
+import com.google.android.gms.ads.AdView;
+
+public class MainActivityFlavoredFragment extends MainActivityFragment {
+
+    public static String TAG = MainActivityFlavoredFragment.class.getSimpleName();
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        RelativeLayout view = (RelativeLayout) super.onCreateView(inflater, container, savedInstanceState);
+        attachBannerAd(view);
+        return view;
+    }
+
+    private void attachBannerAd(RelativeLayout rootView) {
+        // initialize the adview
+        AdView adView = (AdView) LayoutInflater.from(rootView.getContext()).inflate(R.layout.adview, rootView, false);
+        LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
+        params.addRule(RelativeLayout.CENTER_HORIZONTAL);
+        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
+        adView.setLayoutParams(params);
+        rootView.addView(adView);
+        AdRequest adRequest = new AdRequest.Builder()
+                .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
+                .build();
+        adView.loadAd(adRequest);
+    }
+}
diff --git a/app/src/free/res/layout/adview.xml b/app/src/free/res/layout/adview.xml
new file mode 100644
index 0000000..2115a82
--- /dev/null
+++ b/app/src/free/res/layout/adview.xml
@@ -0,0 +1,5 @@
+<com.google.android.gms.ads.AdView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:ads="http://schemas.android.com/apk/res-auto" android:id="@+id/adView"
+    android:layout_width="wrap_content" android:layout_height="wrap_content"
+    android:layout_centerHorizontal="true" android:layout_alignParentBottom="true"
+    ads:adSize="BANNER" ads:adUnitId="@string/banner_ad_unit_id" />
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6d69182..d00fd37 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -12,11 +12,6 @@
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
 
-        <!-- This meta-data tag is required to use Google Play Services. -->
-        <meta-data
-            android:name="com.google.android.gms.version"
-            android:value="@integer/google_play_services_version" />
-
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name" >
@@ -33,11 +28,6 @@
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".MainActivity" />
         </activity>
-        <!-- Include the AdActivity configChanges and theme. -->
-        <activity
-            android:name="com.google.android.gms.ads.AdActivity"
-            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
-            android:theme="@android:style/Theme.Translucent" />
     </application>
 
 </manifest>
diff --git a/app/src/main/java/com/udacity/gradle/builditbigger/MainActivityFragment.java b/app/src/main/java/com/udacity/gradle/builditbigger/MainActivityFragment.java
index 43ff3f9..126bca9 100644
--- a/app/src/main/java/com/udacity/gradle/builditbigger/MainActivityFragment.java
+++ b/app/src/main/java/com/udacity/gradle/builditbigger/MainActivityFragment.java
@@ -8,9 +8,6 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.google.android.gms.ads.AdRequest;
-import com.google.android.gms.ads.AdView;
-
 import net.headlezz.androidjokepresenter.JokePresenterActivity;
 import net.headlezz.jokesbackend.myApi.model.Joke;
 
@@ -18,7 +15,7 @@ import net.headlezz.jokesbackend.myApi.model.Joke;
 /**
  * A placeholder fragment containing a simple view.
  */
-public class MainActivityFragment extends Fragment implements View.OnClickListener, JokeLoaderTask.JokeLoaderCallback {
+public abstract class MainActivityFragment extends Fragment implements View.OnClickListener, JokeLoaderTask.JokeLoaderCallback {
 
     JokeLoaderTask mJokeLoaderTask;
 
@@ -29,19 +26,10 @@ public class MainActivityFragment extends Fragment implements View.OnClickListen
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         View root = inflater.inflate(R.layout.fragment_main, container, false);
-        initAds((AdView) root.findViewById(R.id.adView));
         root.findViewById(R.id.btShowJoke).setOnClickListener(this);
-
         return root;
     }
 
-    private void initAds(AdView adView) {
-        AdRequest adRequest = new AdRequest.Builder()
-                .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
-                .build();
-        adView.loadAd(adRequest);
-    }
-
     @Override
     public void onClick(View v) {
         downloadNewJoke();
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 25df929..45be80f 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,5 +1,5 @@
 <fragment xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools" android:id="@+id/fragment"
-    android:name="com.udacity.gradle.builditbigger.MainActivityFragment"
+    android:name="com.udacity.gradle.builditbigger.MainActivityFlavoredFragment"
     tools:layout="@layout/fragment_main" android:layout_width="match_parent"
     android:layout_height="match_parent" />
diff --git a/app/src/main/res/layout/fragment_main.xml b/app/src/main/res/layout/fragment_main.xml
index 179c7df..b891178 100644
--- a/app/src/main/res/layout/fragment_main.xml
+++ b/app/src/main/res/layout/fragment_main.xml
@@ -1,6 +1,5 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    xmlns:ads="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingLeft="@dimen/activity_horizontal_margin"
@@ -22,15 +21,4 @@
         android:text="@string/button_text"
         android:layout_centerVertical="true"
         android:layout_centerHorizontal="true" />
-
-    <com.google.android.gms.ads.AdView
-        android:id="@+id/adView"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_centerHorizontal="true"
-        android:layout_alignParentBottom="true"
-        ads:adSize="BANNER"
-        ads:adUnitId="@string/banner_ad_unit_id">
-    </com.google.android.gms.ads.AdView>
-
 </RelativeLayout>
diff --git a/app/src/paid/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java b/app/src/paid/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java
new file mode 100644
index 0000000..f72ca96
--- /dev/null
+++ b/app/src/paid/java/com.udacity.gradle.builditbigger/MainActivityFlavoredFragment.java
@@ -0,0 +1,5 @@
+package com.udacity.gradle.builditbigger;
+
+public class MainActivityFlavoredFragment extends MainActivityFragment {
+
+}