diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index e5a9e1ba..63163641 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -3,8 +3,8 @@
 <manifest xmlns:a="http://schemas.android.com/apk/res/android"
 		  package="org.solovyev.android.calculator"
 		  a:installLocation="auto"
-		  a:versionCode="32"
-		  a:versionName="1.2.32">
+		  a:versionCode="33"
+		  a:versionName="1.2.33">
 
 	<uses-permission a:name="android.permission.VIBRATE"/>
 	<uses-permission a:name="android.permission.INTERNET"/>
diff --git a/pom.xml b/pom.xml
index 0785921e..0549ad9c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,8 +109,6 @@
 			<groupId>org.solovyev.android</groupId>
 			<artifactId>billing</artifactId>
 			<version>0.1</version>
-			<scope>system</scope>
-			<systemPath>${additionalLibs}/android_billing.jar</systemPath>
 		</dependency>
 
 		<dependency>
@@ -176,9 +174,6 @@
 			<activation>
 				<activeByDefault>true</activeByDefault>
 			</activation>
-			<modules>
-				<module>../android_common</module>
-			</modules>
 		</profile>
 		<profile>
 			<!-- the release profile does sign, proguard, zipalign ... but does not run instrumentation tests -->
@@ -191,9 +186,6 @@
 					<value>true</value>
 				</property>
 			</activation>
-			<modules>
-				<module>../android_common</module>
-			</modules>
 		</profile>
 	</profiles>
 
diff --git a/res/values-ru/text_about.xml b/res/values-ru/text_about.xml
index 438ccda2..34655dfb 100644
--- a/res/values-ru/text_about.xml
+++ b/res/values-ru/text_about.xml
@@ -144,7 +144,7 @@
 		Я не видел на андроид.маркете калькулятор с похожими возможностями и не думаю, что увижу в ближайшем будущем.\n
 		Но, тем не менее, я хочу развивать его функциональность и поддерживать уже реализованное. Так случилось, что я больше не могу делать это бесплатно - разработка отнимает слишком много времени и усилий,
 		так как приложение стало довольно большим и сложным.\n
-		Если вы хотите поддержать проект и избавиться от рекламы, вы можете купить специальную опцию в настройках приложения,\n
+		Если вы хотите поддержать проект и убрать рекламы, вы можете купить специальную опцию в настройках приложения,\n
 		если вы не хотите или не можете этого сделать - вы по-прежнему можете отблагодарить автора программы по почте: se.solovyev@gmail.com, высоко оценить приложение на андроид.маркете\n
 		или помочь в переводе приложения на свой родной язык.
 	</string>
diff --git a/res/values-ru/text_help.xml b/res/values-ru/text_help.xml
index 5ffa54a7..edc6883d 100644
--- a/res/values-ru/text_help.xml
+++ b/res/values-ru/text_help.xml
@@ -11,7 +11,7 @@
 	<string name="c_screens">Экраны</string>
 
 	<string name="c_faq_content" formatted="false">
-		<b>Как я могу избавиться от рекламы?</b>\n
+		<b>Как я могу убрать рекламу?</b>\n
 		\n
 		Вы можете сделать это купив специальную опцию из настроек приложения.\n
 		\n
diff --git a/res/values-ru/text_strings.xml b/res/values-ru/text_strings.xml
index 20388437..d8d6ee07 100644
--- a/res/values-ru/text_strings.xml
+++ b/res/values-ru/text_strings.xml
@@ -180,7 +180,7 @@
 	<string name="c_billing_error">Биллинг не поддерживается: вы должны иметь Google Checkout аккаунт привязанный в вашему Google аккаунту и должны быть подключены к интернету.</string>
 
 	<string name="c_calc_ad_free_title">Поддержать проект</string>
-	<string name="c_calc_ad_free_summary">И избавиться от рекламы</string>
+	<string name="c_calc_ad_free_summary">И убрать рекламу</string>
 
 	<string name="c_calc_already_purchased">Опция уже была куплена!</string>
 	<string name="c_calc_purchasing">Покупаем...</string>
diff --git a/res/values/text_about.xml b/res/values/text_about.xml
index 560b27b7..48aafd04 100644
--- a/res/values/text_about.xml
+++ b/res/values/text_about.xml
@@ -144,7 +144,7 @@
 		I haven\'t seen in android.market calculator with similar capabilities and I don\'t think I will see it in the close future.\n
 		But still I want to extend it\'s functionality and support already implemented. The thing is that I cannot do it anymore for free - it takes too much time and great efforts from me as
 		application has become rather big and complex.\n
-		If you want to support the project and get rid of the ads please purchase special option from application preferences,\n
+		If you want to support the project and remove the ads please purchase special option from application preferences,\n
 		if you don\'t want to pay or can\'t do it - you still can thank the author of this program by email: se.solovyev@gmail.com, rate application with high mark in android.market\n
 		or help to translate the application to your native language.
 	</string>
diff --git a/res/values/text_help.xml b/res/values/text_help.xml
index 2907735b..c96f0334 100644
--- a/res/values/text_help.xml
+++ b/res/values/text_help.xml
@@ -11,7 +11,7 @@
 	<string name="c_screens">Screens</string>
 
 	<string name="c_faq_content" formatted="false">
-		<b>How can I get rid of the ads?</b>\n
+		<b>How can I remove the ads?</b>\n
 		\n
 		You can do it by purchasing the special option in the main application preferences.\n
 		\n
diff --git a/res/values/text_strings.xml b/res/values/text_strings.xml
index 960e8342..7d07d625 100644
--- a/res/values/text_strings.xml
+++ b/res/values/text_strings.xml
@@ -163,7 +163,7 @@
 	<string name="c_copy_description">Copy description</string>
 	<string name="c_copy_value">Copy value</string>
 
-	<string name="c_first_start_text">Thank you for choosing Calculator++!\n\nCalculator++ is a powerful tool for making everyday calculations.\n\nTo get rid of the ads and support the project you can use special option from application settings.\n\nIt\'s highly recommended to read the FAQ and hints before the work to use all the features of application (press Menu button and then Help)</string>
+	<string name="c_first_start_text">Thank you for choosing Calculator++!\n\nCalculator++ is a powerful tool for making everyday calculations.\n\nTo remove the ads and support the project you can use special option from application settings.\n\nIt\'s highly recommended to read the FAQ and hints before the work to use all the features of application (press Menu button and then Help)</string>
 	<string name="c_first_start_text_title">Welcome</string>
 
 	<string name="c_calc_show_release_notes_title">Show release notes</string>
@@ -180,7 +180,7 @@
 	<string name="c_billing_error">Billing is not supported: you must have Google Checkout account linked to your Google account and must be connected to the internet.</string>
 
 	<string name="c_calc_ad_free_title">Support the project</string>
-	<string name="c_calc_ad_free_summary">And get rid of ads</string>
+	<string name="c_calc_ad_free_summary">And remove the ads</string>
 
 	<string name="c_calc_already_purchased">Ad free option was already purchased!</string>
 	<string name="c_calc_purchasing">Purchasing...</string>
diff --git a/res/xml/preferences.xml b/res/xml/preferences.xml
index ae0b3094..70da6015 100644
--- a/res/xml/preferences.xml
+++ b/res/xml/preferences.xml
@@ -10,8 +10,16 @@
 			a:defaultValue="false"
 			/>
 
+	<org.solovyev.android.ads.AdViewPreference
+			a:key="admob_01"
+			a:layout="@layout/admob_pref"/>
+
 	<PreferenceScreen a:title="@string/c_prefs_calculations_category">
 
+		<org.solovyev.android.ads.AdViewPreference
+				a:key="admob_02"
+				a:layout="@layout/admob_pref"/>
+
 		<android.preference.CheckBoxPreference
 				a:key="@string/p_calc_round_result_key"
 				a:summary="@string/c_calc_round_result_summary"
@@ -61,6 +69,10 @@
 	<PreferenceScreen
 			a:title="@string/c_prefs_appearance_category">
 
+		<org.solovyev.android.ads.AdViewPreference
+				a:key="admob_03"
+				a:layout="@layout/admob_pref"/>
+
 		<android.preference.CheckBoxPreference
 				a:key="@string/p_calc_color_display_key"
 				a:summary="@string/c_calc_color_display_summary"
@@ -127,6 +139,10 @@
 	<PreferenceScreen
 			a:title="@string/c_prefs_other_category">
 
+		<org.solovyev.android.ads.AdViewPreference
+				a:key="admob_04"
+				a:layout="@layout/admob_pref"/>
+
 		<android.preference.CheckBoxPreference
 				a:key="@string/p_calc_show_release_notes_key"
 				a:summary="@string/c_calc_show_release_notes_summary"
diff --git a/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java b/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
index 1b661c3b..b40fe1d4 100644
--- a/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
+++ b/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
@@ -580,11 +580,6 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 				}
 			}
 
-			if ( savedVersion < 29 ) {
-				// just in case
-				CalculatorPreferencesActivity.removeBillingInformation(this, preferences);
-			}
-
 
 			//Log.d(this.getClass().getName(), "Application was opened " + appOpenedCounter + " time!");
 			if (!dialogShown) {
diff --git a/src/misc/lib/android_billing.jar b/src/misc/lib/android_billing.jar
deleted file mode 100644
index f0b1072d..00000000
Binary files a/src/misc/lib/android_billing.jar and /dev/null differ