diff --git a/android-app/src/main/java/org/solovyev/android/calculator/ActivityUi.java b/android-app/src/main/java/org/solovyev/android/calculator/ActivityUi.java
index abe0bf33..b66a5046 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/ActivityUi.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/ActivityUi.java
@@ -112,7 +112,7 @@ public class ActivityUi extends BaseUi {
 		toggleTitle(activity, actionBar, true);
 
 		if (!homeAsUp) {
-			actionBar.setIcon(R.drawable.ab_icon);
+			actionBar.setIcon(R.drawable.ab_logo);
 		}
 		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
 	}
diff --git a/android-app/src/main/res/drawable-hdpi/ab_clock.png b/android-app/src/main/res/drawable-hdpi/ab_clock.png
new file mode 100644
index 00000000..f56de4aa
Binary files /dev/null and b/android-app/src/main/res/drawable-hdpi/ab_clock.png differ
diff --git a/android-app/src/main/res/drawable-hdpi/ab_icon.png b/android-app/src/main/res/drawable-hdpi/ab_icon.png
deleted file mode 100644
index 69634a91..00000000
Binary files a/android-app/src/main/res/drawable-hdpi/ab_icon.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-hdpi/ab_logo.png b/android-app/src/main/res/drawable-hdpi/ab_logo.png
new file mode 100644
index 00000000..7b8e7ee1
Binary files /dev/null and b/android-app/src/main/res/drawable-hdpi/ab_logo.png differ
diff --git a/android-app/src/main/res/drawable-hdpi/ic_access_time_grey600_48dp.png b/android-app/src/main/res/drawable-hdpi/ic_access_time_grey600_48dp.png
deleted file mode 100644
index ac849817..00000000
Binary files a/android-app/src/main/res/drawable-hdpi/ic_access_time_grey600_48dp.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-ldpi/.emptyfolder b/android-app/src/main/res/drawable-ldpi/.emptyfolder
new file mode 100644
index 00000000..e69de29b
diff --git a/android-app/src/main/res/drawable-ldpi/ab_icon.png b/android-app/src/main/res/drawable-ldpi/ab_icon.png
deleted file mode 100644
index 4cdbb58f..00000000
Binary files a/android-app/src/main/res/drawable-ldpi/ab_icon.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-ldpi/kb_logo.png b/android-app/src/main/res/drawable-ldpi/kb_logo.png
deleted file mode 100644
index 1eb95617..00000000
Binary files a/android-app/src/main/res/drawable-ldpi/kb_logo.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-mdpi/ab_clock.png b/android-app/src/main/res/drawable-mdpi/ab_clock.png
new file mode 100644
index 00000000..08eb5338
Binary files /dev/null and b/android-app/src/main/res/drawable-mdpi/ab_clock.png differ
diff --git a/android-app/src/main/res/drawable-mdpi/ab_icon.png b/android-app/src/main/res/drawable-mdpi/ab_icon.png
deleted file mode 100644
index 795d5580..00000000
Binary files a/android-app/src/main/res/drawable-mdpi/ab_icon.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-mdpi/ab_logo.png b/android-app/src/main/res/drawable-mdpi/ab_logo.png
new file mode 100644
index 00000000..40e7a417
Binary files /dev/null and b/android-app/src/main/res/drawable-mdpi/ab_logo.png differ
diff --git a/android-app/src/main/res/drawable-mdpi/ic_access_time_grey600_48dp.png b/android-app/src/main/res/drawable-mdpi/ic_access_time_grey600_48dp.png
deleted file mode 100644
index df545efa..00000000
Binary files a/android-app/src/main/res/drawable-mdpi/ic_access_time_grey600_48dp.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-xhdpi/ab_clock.png b/android-app/src/main/res/drawable-xhdpi/ab_clock.png
new file mode 100644
index 00000000..5fa9c892
Binary files /dev/null and b/android-app/src/main/res/drawable-xhdpi/ab_clock.png differ
diff --git a/android-app/src/main/res/drawable-xhdpi/ab_icon.png b/android-app/src/main/res/drawable-xhdpi/ab_icon.png
deleted file mode 100644
index e7672e87..00000000
Binary files a/android-app/src/main/res/drawable-xhdpi/ab_icon.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-xhdpi/ab_logo.png b/android-app/src/main/res/drawable-xhdpi/ab_logo.png
new file mode 100644
index 00000000..c0b599e1
Binary files /dev/null and b/android-app/src/main/res/drawable-xhdpi/ab_logo.png differ
diff --git a/android-app/src/main/res/drawable-xhdpi/ic_access_time_grey600_48dp.png b/android-app/src/main/res/drawable-xhdpi/ic_access_time_grey600_48dp.png
deleted file mode 100644
index b8c7311f..00000000
Binary files a/android-app/src/main/res/drawable-xhdpi/ic_access_time_grey600_48dp.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-xxhdpi/ab_clock.png b/android-app/src/main/res/drawable-xxhdpi/ab_clock.png
new file mode 100644
index 00000000..6759067c
Binary files /dev/null and b/android-app/src/main/res/drawable-xxhdpi/ab_clock.png differ
diff --git a/android-app/src/main/res/drawable-xxhdpi/ab_logo.png b/android-app/src/main/res/drawable-xxhdpi/ab_logo.png
new file mode 100644
index 00000000..9107d931
Binary files /dev/null and b/android-app/src/main/res/drawable-xxhdpi/ab_logo.png differ
diff --git a/android-app/src/main/res/drawable-xxhdpi/ic_access_time_grey600_48dp.png b/android-app/src/main/res/drawable-xxhdpi/ic_access_time_grey600_48dp.png
deleted file mode 100644
index 3715a0ac..00000000
Binary files a/android-app/src/main/res/drawable-xxhdpi/ic_access_time_grey600_48dp.png and /dev/null differ
diff --git a/android-app/src/main/res/drawable-xxxhdpi/ab_logo.png b/android-app/src/main/res/drawable-xxxhdpi/ab_logo.png
new file mode 100644
index 00000000..9e8f92af
Binary files /dev/null and b/android-app/src/main/res/drawable-xxxhdpi/ab_logo.png differ
diff --git a/android-app/src/main/res/menu/history_menu.xml b/android-app/src/main/res/menu/history_menu.xml
index 2a439f41..c18944b7 100644
--- a/android-app/src/main/res/menu/history_menu.xml
+++ b/android-app/src/main/res/menu/history_menu.xml
@@ -33,7 +33,7 @@
 
 	<item
 		a:id="@+id/menu_history_toggle_datetime"
-		a:icon="@drawable/ic_access_time_grey600_48dp"
+		a:icon="@drawable/ab_clock"
 		a:title="@string/c_toggle_datetime"
 		app:showAsAction="ifRoom" />