diff --git a/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSlice.java b/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSlice.java
index 2025a06..17cae77 100644
--- a/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSlice.java
+++ b/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSlice.java
@@ -16,14 +16,23 @@
 
 package com.android.settings.homepage.contextualcards.slices;
 
+import static android.content.Context.MODE_PRIVATE;
+
 import android.content.Context;
 import android.net.Uri;
+import android.util.ArraySet;
 
 import com.android.settings.R;
 import com.android.settings.slices.CustomSliceRegistry;
+import com.android.settings.slices.SliceBackgroundWorker;
+
+import java.util.Set;
 
 public class ContextualNotificationChannelSlice extends NotificationChannelSlice {
 
+    public static final String PREFS = "notification_channel_slice_prefs";
+    public static final String PREF_KEY_INTERACTED_PACKAGES = "interacted_packages";
+
     public ContextualNotificationChannelSlice(Context context) {
         super(context);
     }
@@ -37,4 +46,18 @@
     protected CharSequence getSubTitle(String packageName, int uid) {
         return mContext.getText(R.string.recently_installed_app);
     }
+
+    @Override
+    protected boolean isUserInteracted(String packageName) {
+        // Check the package has been interacted on current slice or not.
+        final Set<String> interactedPackages =
+                mContext.getSharedPreferences(PREFS, MODE_PRIVATE)
+                        .getStringSet(PREF_KEY_INTERACTED_PACKAGES, new ArraySet<>());
+        return interactedPackages.contains(packageName);
+    }
+
+    @Override
+    public Class<? extends SliceBackgroundWorker> getBackgroundWorkerClass() {
+        return NotificationChannelWorker.class;
+    }
 }
diff --git a/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSlice.java b/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSlice.java
index 0550e7b..e5cee37 100644
--- a/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSlice.java
+++ b/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSlice.java
@@ -218,6 +218,17 @@
                 .toIntent();
     }
 
+    /**
+     * Check the package has been interacted by user or not.
+     * Will use to filter package in {@link #getRecentlyInstalledPackages()}.
+     *
+     * @param packageName The app package name.
+     * @return true if the package was interacted, false otherwise.
+     */
+    protected boolean isUserInteracted(String packageName) {
+        return false;
+    }
+
     @VisibleForTesting
     IconCompat getApplicationIcon(String packageName) {
         final Drawable drawable;
@@ -328,8 +339,9 @@
         final List<PackageInfo> installedPackages =
                 mContext.getPackageManager().getInstalledPackages(0);
         for (PackageInfo packageInfo : installedPackages) {
-            // Not include system app.
-            if (packageInfo.applicationInfo.isSystemApp()) {
+            // Not include system app and interacted app.
+            if (packageInfo.applicationInfo.isSystemApp()
+                    || isUserInteracted(packageInfo.packageName)) {
                 continue;
             }
 
diff --git a/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorker.java b/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorker.java
new file mode 100644
index 0000000..f1d0d59
--- /dev/null
+++ b/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorker.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.homepage.contextualcards.slices;
+
+import static android.content.Context.MODE_PRIVATE;
+
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREFS;
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREF_KEY_INTERACTED_PACKAGES;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.pm.PackageInfo;
+import android.net.Uri;
+import android.util.ArraySet;
+
+import com.android.settings.slices.SliceBackgroundWorker;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class NotificationChannelWorker extends SliceBackgroundWorker<Void> {
+
+    public NotificationChannelWorker(Context context, Uri uri) {
+        super(context, uri);
+    }
+
+    @Override
+    protected void onSlicePinned() {
+    }
+
+    @Override
+    protected void onSliceUnpinned() {
+        removeUninstalledPackages();
+    }
+
+    @Override
+    public void close() throws IOException {
+    }
+
+    private void removeUninstalledPackages() {
+        final SharedPreferences prefs = getContext().getSharedPreferences(PREFS, MODE_PRIVATE);
+        final Set<String> interactedPackages =
+                prefs.getStringSet(PREF_KEY_INTERACTED_PACKAGES, new ArraySet());
+        if (interactedPackages.isEmpty()) {
+            return;
+        }
+
+        final List<PackageInfo> installedPackageInfos =
+                getContext().getPackageManager().getInstalledPackages(0);
+        final List<String> installedPackages = installedPackageInfos.stream()
+                .map(packageInfo -> packageInfo.packageName)
+                .collect(Collectors.toList());
+        final Set<String> newInteractedPackages = new ArraySet<>();
+        for (String packageName : interactedPackages) {
+            if (installedPackages.contains(packageName)) {
+                newInteractedPackages.add(packageName);
+            }
+        }
+        prefs.edit().putStringSet(PREF_KEY_INTERACTED_PACKAGES, newInteractedPackages).apply();
+    }
+}
diff --git a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSliceTest.java b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSliceTest.java
index f2b87be..8541a30 100644
--- a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSliceTest.java
+++ b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/ContextualNotificationChannelSliceTest.java
@@ -16,30 +16,49 @@
 
 package com.android.settings.homepage.contextualcards.slices;
 
+import static android.content.Context.MODE_PRIVATE;
+
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREFS;
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREF_KEY_INTERACTED_PACKAGES;
+
 import static com.google.common.truth.Truth.assertThat;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.net.Uri;
+import android.util.ArraySet;
 
 import com.android.settings.R;
 import com.android.settings.slices.CustomSliceRegistry;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 
+import java.util.Set;
+
 @RunWith(RobolectricTestRunner.class)
 public class ContextualNotificationChannelSliceTest {
 
+    private static final String PACKAGE_NAME = "package_name";
+
     private Context mContext;
     private ContextualNotificationChannelSlice mNotificationChannelSlice;
+    private SharedPreferences mSharedPreferences;
 
     @Before
     public void setUp() {
         mContext = RuntimeEnvironment.application;
         mNotificationChannelSlice = new ContextualNotificationChannelSlice(mContext);
+        mSharedPreferences = mContext.getSharedPreferences(PREFS, MODE_PRIVATE);
+    }
+
+    @After
+    public void tearDown() {
+        removeInteractedPackageFromSharedPreference();
     }
 
     @Test
@@ -55,4 +74,34 @@
 
         assertThat(subTitle).isEqualTo(mContext.getText(R.string.recently_installed_app));
     }
+
+    @Test
+    public void isUserInteracted_hasInteractedPackage_shouldBeTrue() {
+        addInteractedPackageToSharedPreference();
+
+        final boolean isInteracted = mNotificationChannelSlice.isUserInteracted(PACKAGE_NAME);
+
+        assertThat(isInteracted).isTrue();
+    }
+
+    @Test
+    public void isUserInteracted_noInteractedPackage_shouldBeFalse() {
+        final boolean isInteracted = mNotificationChannelSlice.isUserInteracted(PACKAGE_NAME);
+
+        assertThat(isInteracted).isFalse();
+    }
+
+    private void addInteractedPackageToSharedPreference() {
+        final Set<String> interactedPackages = new ArraySet<>();
+        interactedPackages.add(PACKAGE_NAME);
+
+        mSharedPreferences.edit().putStringSet(PREF_KEY_INTERACTED_PACKAGES,
+                interactedPackages).apply();
+    }
+
+    private void removeInteractedPackageFromSharedPreference() {
+        if (mSharedPreferences.contains(PREF_KEY_INTERACTED_PACKAGES)) {
+            mSharedPreferences.edit().remove(PREF_KEY_INTERACTED_PACKAGES).apply();
+        }
+    }
 }
diff --git a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSliceTest.java b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSliceTest.java
index 12513f6..81f5797 100644
--- a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSliceTest.java
+++ b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelSliceTest.java
@@ -26,7 +26,6 @@
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.when;
 import static org.robolectric.Shadows.shadowOf;
 
 import android.app.NotificationChannel;
@@ -299,6 +298,21 @@
         assertThat(metadata.getTitle()).isEqualTo(mContext.getString(R.string.no_suggested_app));
     }
 
+    @Test
+    @Config(shadows = ShadowRestrictedLockUtilsInternal.class)
+    public void getSlice_isInteractedPackage_shouldHaveNoSuggestedAppTitle() {
+        addMockPackageToPackageManager(true /* isRecentlyInstalled */,
+                ApplicationInfo.FLAG_INSTALLED);
+        mockNotificationBackend(CHANNEL_COUNT, NOTIFICATION_COUNT, false /* banned */,
+                false /* isChannelBlocked */);
+        doReturn(true).when(mNotificationChannelSlice).isUserInteracted(any(String.class));
+
+        final Slice slice = mNotificationChannelSlice.getSlice();
+
+        final SliceMetadata metadata = SliceMetadata.from(mContext, slice);
+        assertThat(metadata.getTitle()).isEqualTo(mContext.getString(R.string.no_suggested_app));
+    }
+
     private void addMockPackageToPackageManager(boolean isRecentlyInstalled, int flags) {
         final ApplicationInfo applicationInfo = new ApplicationInfo();
         applicationInfo.name = APP_LABEL;
diff --git a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorkerTest.java b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorkerTest.java
new file mode 100644
index 0000000..6ac8b70
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/NotificationChannelWorkerTest.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.homepage.contextualcards.slices;
+
+import static android.content.Context.MODE_PRIVATE;
+
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREFS;
+import static com.android.settings.homepage.contextualcards.slices.ContextualNotificationChannelSlice.PREF_KEY_INTERACTED_PACKAGES;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.robolectric.Shadows.shadowOf;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.pm.PackageInfo;
+import android.net.Uri;
+import android.util.ArraySet;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.shadows.ShadowPackageManager;
+
+import java.util.Set;
+
+@RunWith(RobolectricTestRunner.class)
+public class NotificationChannelWorkerTest {
+    private static final Uri URI = Uri.parse("content://com.android.settings.slices/test");
+    private static final String PACKAGE_NAME = "com.test.notification.channel.slice";
+
+    private Context mContext;
+    private NotificationChannelWorker mNotificationChannelWorker;
+    private ShadowPackageManager mPackageManager;
+    private SharedPreferences mSharedPreferences;
+
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mNotificationChannelWorker = new NotificationChannelWorker(mContext, URI);
+
+        // Shadow PackageManager to add mock package.
+        mPackageManager = shadowOf(mContext.getPackageManager());
+
+        mSharedPreferences = mContext.getSharedPreferences(PREFS, MODE_PRIVATE);
+        addInteractedPackageToSharedPreference();
+    }
+
+    @After
+    public void tearDown() {
+        mPackageManager.removePackage(PACKAGE_NAME);
+        removeInteractedPackageFromSharedPreference();
+    }
+
+    @Test
+    public void onSliceUnpinned_interactedPackageIsUninstalled_shouldRemovePackage() {
+        mNotificationChannelWorker.onSliceUnpinned();
+
+        final Set<String> interactedPackages = mSharedPreferences.getStringSet(
+                PREF_KEY_INTERACTED_PACKAGES, new ArraySet<>());
+        assertThat(interactedPackages.contains(PACKAGE_NAME)).isFalse();
+    }
+
+    @Test
+    public void onSliceUnpinned_interactedPackageIsInstalled_shouldKeepPackage() {
+        mockInteractedPackageAsInstalled();
+
+        mNotificationChannelWorker.onSliceUnpinned();
+
+        final Set<String> interactedPackages = mSharedPreferences.getStringSet(
+                PREF_KEY_INTERACTED_PACKAGES, new ArraySet<>());
+        assertThat(interactedPackages.contains(PACKAGE_NAME)).isTrue();
+    }
+
+    private void mockInteractedPackageAsInstalled() {
+        final PackageInfo packageInfo = new PackageInfo();
+        packageInfo.packageName = PACKAGE_NAME;
+        mPackageManager.addPackage(packageInfo);
+    }
+
+    private void addInteractedPackageToSharedPreference() {
+        final Set<String> interactedPackages = new ArraySet<>();
+        interactedPackages.add(PACKAGE_NAME);
+
+        mSharedPreferences.edit().putStringSet(PREF_KEY_INTERACTED_PACKAGES,
+                interactedPackages).apply();
+    }
+
+    private void removeInteractedPackageFromSharedPreference() {
+        if (mSharedPreferences.contains(PREF_KEY_INTERACTED_PACKAGES)) {
+            mSharedPreferences.edit().remove(PREF_KEY_INTERACTED_PACKAGES).apply();
+        }
+    }
+}