diff --git a/android-app/android-app.iml b/android-app/android-app.iml
index 3397c804..c7441375 100644
--- a/android-app/android-app.iml
+++ b/android-app/android-app.iml
@@ -83,8 +83,8 @@
     </content>
     <orderEntry type="jdk" jdkName="Android API 21 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" exported="" name="play-services-6.5.87" level="project" />
     <orderEntry type="library" exported="" name="support-v4-21.0.3" level="project" />
+    <orderEntry type="library" exported="" name="play-services-ads-6.5.87" level="project" />
     <orderEntry type="library" exported="" name="acra-4.5.0" level="project" />
     <orderEntry type="library" exported="" name="annotations-2.0.1" level="project" />
     <orderEntry type="library" exported="" name="common-core-1.0.7" level="project" />
@@ -98,6 +98,7 @@
     <orderEntry type="library" exported="" name="android-common-menus-1.1.18" level="project" />
     <orderEntry type="library" exported="" name="recyclerview-v7-21.0.0" level="project" />
     <orderEntry type="library" exported="" name="common-security-1.0.7" level="project" />
+    <orderEntry type="library" exported="" name="play-services-base-6.5.87" level="project" />
     <orderEntry type="library" exported="" name="android-common-core-1.1.18" level="project" />
     <orderEntry type="library" exported="" name="checkout-0.6.0" level="project" />
     <orderEntry type="library" exported="" name="common-msg-1.0.5" level="project" />
diff --git a/android-app/build.gradle b/android-app/build.gradle
index 560488ab..065466b9 100644
--- a/android-app/build.gradle
+++ b/android-app/build.gradle
@@ -70,7 +70,8 @@ dependencies {
         exclude(module: 'xercesImpl')
     }
     compile 'org.solovyev.android:checkout:0.6.0@aar'
-    compile 'com.google.android.gms:play-services:6.5.87@aar'
+    compile 'com.google.android.gms:play-services-ads:6.5.87@aar'
+    compile 'com.google.android.gms:play-services-base:6.5.87@aar'
     compile 'com.melnykov:floatingactionbutton:1.1.0'
 }
 
@@ -100,6 +101,28 @@ signing {
     sign configurations.archives
 }
 
+gradle.taskGraph.afterTask { Task task ->
+    if (task.project.name == 'android-app') {
+        if (task.name == 'mergeReleaseResources') {
+            cleanGoogleServicesResources('release')
+        } else if (task.name == 'mergeDebugResources') {
+            cleanGoogleServicesResources('debug')
+        }
+    }
+}
+
+private void cleanGoogleServicesResources(buildType) {
+    ant.delete(includeEmptyDirs: 'true') {
+        fileset(dir: file('./build/intermediates/res/' + buildType), includes: '**/common_signin*')
+    }
+    ant.delete(includeEmptyDirs: 'true') {
+        fileset(dir: file('./build/intermediates/res/' + buildType), includes: '**/ic_plusone*')
+    }
+    ant.delete(includeEmptyDirs: 'true') {
+        fileset(dir: file('./build/intermediates/res/' + buildType), includes: '**/powered_by_google*')
+    }
+}
+
 group = "org.solovyev.android"
 archivesBaseName = "calculatorpp-android-app"
 version = version_name()
diff --git a/android-app/proguard-debug.cfg b/android-app/proguard-debug.cfg
index 7c237aa5..12a5e548 100644
--- a/android-app/proguard-debug.cfg
+++ b/android-app/proguard-debug.cfg
@@ -65,28 +65,16 @@
 -dontwarn com.google.ads.**
 -dontwarn com.sun.org.apache.xerces.internal.impl.dv.util.Base64
 -dontwarn com.actionbarsherlock.BuildConfig
--dontwarn com.google.android.gms.**
--dontwarn com.melnykov.fab.**
--dontwarn android.support.v7.**
--keep class android.support.v7.** { *; }
--keep interface android.support.v7.** { *; }
+-dontwarn com.google.android.gms.internal.*
 
 -keep class org.simpleframework.xml.** { *; }
 -keep class * implements org.solovyev.android.calculator.model.MathPersistenceEntity
 -keep class * implements org.solovyev.android.calculator.MathEntityPersistenceContainer
 
-#
-#*********************************************************************
-#
-#                          SHERLOCK
-#
-#*********************************************************************
-#
-
 -keep class android.support.v4.app.** { *; }
 -keep interface android.support.v4.app.** { *; }
--keep class com.actionbarsherlock.** { *; }
--keep interface com.actionbarsherlock.** { *; }
+-keep class android.support.v7.** { *; }
+-keep interface android.support.v7.** { *; }
 
 
 #
diff --git a/android-app/proguard.cfg b/android-app/proguard.cfg
index 10f6c572..a62000ad 100644
--- a/android-app/proguard.cfg
+++ b/android-app/proguard.cfg
@@ -64,16 +64,17 @@
 -dontwarn com.google.ads.**
 -dontwarn com.sun.org.apache.xerces.internal.impl.dv.util.Base64
 -dontwarn com.actionbarsherlock.BuildConfig
--dontwarn com.google.android.gms.**
--dontwarn com.melnykov.fab.**
--dontwarn android.support.v7.**
--keep class android.support.v7.** { *; }
--keep interface android.support.v7.** { *; }
+-dontwarn com.google.android.gms.internal.*
 
 -keep class org.simpleframework.xml.** { *; }
 -keep class * implements org.solovyev.android.calculator.model.MathPersistenceEntity
 -keep class * implements org.solovyev.android.calculator.MathEntityPersistenceContainer
 
+-keep class android.support.v4.app.** { *; }
+-keep interface android.support.v4.app.** { *; }
+-keep class android.support.v7.** { *; }
+-keep interface android.support.v7.** { *; }
+
 #
 #*********************************************************************
 #
@@ -90,19 +91,6 @@
     public static int e(...);
 }
 
-#
-#*********************************************************************
-#
-#                          SHERLOCK
-#
-#*********************************************************************
-#
-
--keep class android.support.v4.app.** { *; }
--keep interface android.support.v4.app.** { *; }
--keep class com.actionbarsherlock.** { *; }
--keep interface com.actionbarsherlock.** { *; }
-
 #
 #*********************************************************************
 #