diff --git a/data/src/main/java/manager/ExternalBlockingManagerImpl.kt b/data/src/main/java/manager/ExternalBlockingManagerImpl.kt
index 48c18e1e..57c86ac5 100644
--- a/data/src/main/java/manager/ExternalBlockingManagerImpl.kt
+++ b/data/src/main/java/manager/ExternalBlockingManagerImpl.kt
@@ -30,10 +30,14 @@ import androidx.os.bundleOf
 import io.reactivex.Single
 import io.reactivex.subjects.SingleSubject
 import timber.log.Timber
+import util.Preferences
 import util.tryOrNull
 import javax.inject.Inject
 
-class ExternalBlockingManagerImpl @Inject constructor(private val context: Context) : ExternalBlockingManager {
+class ExternalBlockingManagerImpl @Inject constructor(
+        private val context: Context,
+        private val prefs: Preferences
+) : ExternalBlockingManager {
 
     companion object {
         const val RATING_UNKNOWN = 0
@@ -48,23 +52,33 @@ class ExternalBlockingManagerImpl @Inject constructor(private val context: Conte
      * Return a Single<Boolean> which emits whether or not the given [address] should be blocked
      */
     override fun shouldBlock(address: String): Single<Boolean> {
-        return Binder(context, address).shouldBlock()
+        return Binder(context, prefs, address).shouldBlock()
     }
 
-    private class Binder(private val context: Context, private val address: String) : ServiceConnection {
+    private class Binder(
+            private val context: Context,
+            private val prefs: Preferences,
+            private val address: String
+    ) : ServiceConnection {
 
         private val subject: SingleSubject<Boolean> = SingleSubject.create()
         private var serviceMessenger: Messenger? = null
         private var isBound: Boolean = false
 
         fun shouldBlock(): Single<Boolean> {
-            // If either version of Should I Answer? is installed, build the intent to request a rating
-            val intent = tryOrNull {
-                context.packageManager.getApplicationInfo("org.mistergroup.shouldianswerpersonal", 0).enabled
-                Intent("org.mistergroup.shouldianswerpersonal.PublicService").setPackage("org.mistergroup.shouldianswerpersonal")
-            } ?: tryOrNull {
-                context.packageManager.getApplicationInfo("org.mistergroup.muzutozvednout", 0).enabled
-                Intent("org.mistergroup.muzutozvednout.PublicService").setPackage("org.mistergroup.muzutozvednout")
+
+            var intent: Intent? = null
+
+            // If either version of Should I Answer? is installed and SIA is enabled, build the
+            // intent to request a rating
+            if (prefs.sia.get()) {
+                intent = tryOrNull {
+                    context.packageManager.getApplicationInfo("org.mistergroup.shouldianswerpersonal", 0).enabled
+                    Intent("org.mistergroup.shouldianswerpersonal.PublicService").setPackage("org.mistergroup.shouldianswerpersonal")
+                } ?: tryOrNull {
+                    context.packageManager.getApplicationInfo("org.mistergroup.muzutozvednout", 0).enabled
+                    Intent("org.mistergroup.muzutozvednout.PublicService").setPackage("org.mistergroup.muzutozvednout")
+                }
             }
 
             // If the intent isn't null, bind the service and wait for a result. Otherwise, don't block
diff --git a/data/src/main/java/repository/MessageRepositoryImpl.kt b/data/src/main/java/repository/MessageRepositoryImpl.kt
index 666379c7..1391e063 100644
--- a/data/src/main/java/repository/MessageRepositoryImpl.kt
+++ b/data/src/main/java/repository/MessageRepositoryImpl.kt
@@ -91,14 +91,11 @@ class MessageRepositoryImpl @Inject constructor(
                 .findAll())
     }
 
-    override fun getBlockedConversations(): Flowable<List<Conversation>> {
+    override fun getBlockedConversations(): RealmResults<Conversation> {
         return Realm.getDefaultInstance()
                 .where(Conversation::class.java)
                 .equalTo("blocked", true)
                 .findAllAsync()
-                .asFlowable()
-                .filter { it.isLoaded }
-                .map { it.toList() }
     }
 
     override fun getConversationAsync(threadId: Long): Conversation {
diff --git a/data/src/main/java/util/Preferences.kt b/data/src/main/java/util/Preferences.kt
index 1475e7a9..e6eabe85 100644
--- a/data/src/main/java/util/Preferences.kt
+++ b/data/src/main/java/util/Preferences.kt
@@ -45,6 +45,7 @@ class Preferences @Inject constructor(private val rxPrefs: RxSharedPreferences)
     val nightStart = rxPrefs.getString("nightStart", "6:00 PM")
     val nightEnd = rxPrefs.getString("nightEnd", "6:00 AM")
     val black = rxPrefs.getBoolean("black", false)
+    val sia = rxPrefs.getBoolean("sia", false)
     val autoEmoji = rxPrefs.getBoolean("autoEmoji", true)
     val delivery = rxPrefs.getBoolean("delivery", false)
     val textSize = rxPrefs.getInteger("textSize", TEXT_SIZE_NORMAL)
diff --git a/domain/src/main/java/repository/MessageRepository.kt b/domain/src/main/java/repository/MessageRepository.kt
index 928f95ef..b732b290 100644
--- a/domain/src/main/java/repository/MessageRepository.kt
+++ b/domain/src/main/java/repository/MessageRepository.kt
@@ -31,7 +31,7 @@ interface MessageRepository {
 
     fun getConversationsSnapshot(): List<Conversation>
 
-    fun getBlockedConversations(): Flowable<List<Conversation>>
+    fun getBlockedConversations(): RealmResults<Conversation>
 
     fun getConversationAsync(threadId: Long): Conversation
 
diff --git a/presentation/src/main/java/common/Navigator.kt b/presentation/src/main/java/common/Navigator.kt
index cbecbbc6..3c04d7c5 100644
--- a/presentation/src/main/java/common/Navigator.kt
+++ b/presentation/src/main/java/common/Navigator.kt
@@ -145,6 +145,15 @@ class Navigator @Inject constructor(private val context: Context, private val no
         startActivityExternal(intent)
     }
 
+    /**
+     * Launch the Play Store and display the Should I Answer? listing
+     */
+    fun showSia() {
+        val url = "https://play.google.com/store/apps/details?id=org.mistergroup.shouldianswerpersonal"
+        val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
+        startActivity(intent)
+    }
+
     fun showSupport() {
         val intent = Intent(Intent.ACTION_SENDTO)
         intent.data = Uri.parse("mailto:")
diff --git a/presentation/src/main/java/feature/blocked/BlockedActivity.kt b/presentation/src/main/java/feature/blocked/BlockedActivity.kt
index 8f806e37..5619b8b9 100644
--- a/presentation/src/main/java/feature/blocked/BlockedActivity.kt
+++ b/presentation/src/main/java/feature/blocked/BlockedActivity.kt
@@ -20,15 +20,16 @@ package feature.blocked
 
 import android.app.AlertDialog
 import android.os.Bundle
+import com.jakewharton.rxbinding2.view.clicks
 import com.moez.QKSMS.R
 import com.uber.autodispose.android.lifecycle.scope
 import com.uber.autodispose.kotlin.autoDisposable
+import common.base.QkThemedActivity
 import injection.appComponent
-import common.util.extensions.setVisible
 import io.reactivex.subjects.PublishSubject
 import io.reactivex.subjects.Subject
 import kotlinx.android.synthetic.main.blocked_activity.*
-import common.base.QkThemedActivity
+import kotlinx.android.synthetic.main.settings_switch_widget.view.*
 import javax.inject.Inject
 
 class BlockedActivity : QkThemedActivity<BlockedViewModel>(), BlockedView {
@@ -36,6 +37,7 @@ class BlockedActivity : QkThemedActivity<BlockedViewModel>(), BlockedView {
     @Inject lateinit var blockedAdapter: BlockedAdapter
 
     override val viewModelClass = BlockedViewModel::class
+    override val siaClickedIntent by lazy { shouldIAnswer.clicks() }
     override val unblockIntent by lazy { blockedAdapter.unblock }
     override val confirmUnblockIntent: Subject<Unit> = PublishSubject.create()
 
@@ -54,12 +56,14 @@ class BlockedActivity : QkThemedActivity<BlockedViewModel>(), BlockedView {
                 .autoDisposable(scope())
                 .subscribe { color -> window.decorView.setBackgroundColor(color) }
 
+        blockedAdapter.emptyView = empty
         conversations.adapter = blockedAdapter
     }
 
     override fun render(state: BlockedState) {
-        blockedAdapter.flowable = state.data
-        empty.setVisible(state.empty)
+        shouldIAnswer.checkbox.isChecked = state.siaEnabled
+
+        blockedAdapter.updateData(state.data)
     }
 
     override fun showUnblockDialog() {
diff --git a/presentation/src/main/java/feature/blocked/BlockedAdapter.kt b/presentation/src/main/java/feature/blocked/BlockedAdapter.kt
index 2fc6a76a..93856153 100644
--- a/presentation/src/main/java/feature/blocked/BlockedAdapter.kt
+++ b/presentation/src/main/java/feature/blocked/BlockedAdapter.kt
@@ -22,16 +22,16 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import com.moez.QKSMS.R
+import common.base.QkRealmAdapter
+import common.base.QkViewHolder
 import io.reactivex.subjects.PublishSubject
 import kotlinx.android.synthetic.main.blocked_list_item.view.*
 import model.Contact
 import model.Conversation
 import model.PhoneNumber
-import common.base.FlowableAdapter
-import common.base.QkViewHolder
 import javax.inject.Inject
 
-class BlockedAdapter @Inject constructor(private val context: Context) : FlowableAdapter<Conversation>() {
+class BlockedAdapter @Inject constructor(private val context: Context) : QkRealmAdapter<Conversation>() {
 
     val unblock: PublishSubject<Long> = PublishSubject.create()
 
@@ -40,7 +40,7 @@ class BlockedAdapter @Inject constructor(private val context: Context) : Flowabl
     }
 
     override fun onBindViewHolder(holder: QkViewHolder, position: Int) {
-        val conversation = getItem(position)
+        val conversation = getItem(position)!!
         val view = holder.itemView
 
         view.setOnClickListener { unblock.onNext(conversation.id) }
diff --git a/presentation/src/main/java/feature/blocked/BlockedState.kt b/presentation/src/main/java/feature/blocked/BlockedState.kt
index f7ca41cd..41fae68e 100644
--- a/presentation/src/main/java/feature/blocked/BlockedState.kt
+++ b/presentation/src/main/java/feature/blocked/BlockedState.kt
@@ -18,10 +18,10 @@
  */
 package feature.blocked
 
-import io.reactivex.Flowable
+import io.realm.RealmResults
 import model.Conversation
 
 data class BlockedState(
-        val data: Flowable<List<Conversation>>? = null,
-        val empty: Boolean = false
+        val siaEnabled: Boolean = false,
+        val data: RealmResults<Conversation>? = null
 )
\ No newline at end of file
diff --git a/presentation/src/main/java/feature/blocked/BlockedView.kt b/presentation/src/main/java/feature/blocked/BlockedView.kt
index 17f422fe..0f5c1561 100644
--- a/presentation/src/main/java/feature/blocked/BlockedView.kt
+++ b/presentation/src/main/java/feature/blocked/BlockedView.kt
@@ -18,13 +18,14 @@
  */
 package feature.blocked
 
-import io.reactivex.Observable
 import common.base.QkView
+import io.reactivex.Observable
 
 interface BlockedView : QkView<BlockedState> {
 
+    val siaClickedIntent: Observable<*>
     val unblockIntent: Observable<Long>
-    val confirmUnblockIntent: Observable<Unit>
+    val confirmUnblockIntent: Observable<*>
 
     fun showUnblockDialog()
 
diff --git a/presentation/src/main/java/feature/blocked/BlockedViewModel.kt b/presentation/src/main/java/feature/blocked/BlockedViewModel.kt
index 925b7f2d..cd3f6f04 100644
--- a/presentation/src/main/java/feature/blocked/BlockedViewModel.kt
+++ b/presentation/src/main/java/feature/blocked/BlockedViewModel.kt
@@ -18,32 +18,51 @@
  */
 package feature.blocked
 
+import android.content.Context
 import com.uber.autodispose.android.lifecycle.scope
 import com.uber.autodispose.kotlin.autoDisposable
+import common.Navigator
+import common.base.QkViewModel
 import injection.appComponent
 import interactor.MarkUnblocked
+import io.reactivex.rxkotlin.plusAssign
 import io.reactivex.rxkotlin.withLatestFrom
-import common.base.QkViewModel
 import repository.MessageRepository
+import util.Preferences
+import util.tryOrNull
 import javax.inject.Inject
 
 class BlockedViewModel : QkViewModel<BlockedView, BlockedState>(BlockedState()) {
 
+    @Inject lateinit var context: Context
     @Inject lateinit var markUnblocked: MarkUnblocked
     @Inject lateinit var messageRepo: MessageRepository
+    @Inject lateinit var navigator: Navigator
+    @Inject lateinit var prefs: Preferences
 
     init {
         appComponent.inject(this)
 
-        val conversations = messageRepo.getBlockedConversations()
-                .doOnNext { conversations -> newState { it.copy(empty = conversations.isEmpty()) } }
+        newState { it.copy(data = messageRepo.getBlockedConversations()) }
 
-        newState { it.copy(data = conversations) }
+        disposables += prefs.sia.asObservable()
+                .subscribe { enabled -> newState { it.copy(siaEnabled = enabled) } }
     }
 
     override fun bindView(view: BlockedView) {
         super.bindView(view)
 
+        view.siaClickedIntent
+                .map {
+                    tryOrNull { context.packageManager.getApplicationInfo("org.mistergroup.shouldianswerpersonal", 0).enabled }
+                            ?: tryOrNull { context.packageManager.getApplicationInfo("org.mistergroup.muzutozvednout", 0).enabled }
+                            ?: false
+                }
+                .doOnNext { installed -> if (!installed) navigator.showSia() }
+                .withLatestFrom(prefs.sia.asObservable(), { installed, enabled -> installed && !enabled })
+                .autoDisposable(view.scope())
+                .subscribe { shouldEnable -> prefs.sia.set(shouldEnable) }
+
         // Show confirm unblock conversation dialog
         view.unblockIntent
                 .autoDisposable(view.scope())
diff --git a/presentation/src/main/res/layout/blocked_activity.xml b/presentation/src/main/res/layout/blocked_activity.xml
index 6d5c24cf..47a1af18 100644
--- a/presentation/src/main/res/layout/blocked_activity.xml
+++ b/presentation/src/main/res/layout/blocked_activity.xml
@@ -43,18 +43,44 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/toolbar" />
 
-    <android.support.v7.widget.RecyclerView
-        android:id="@+id/conversations"
+    <android.support.v4.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="0dp"
-        android:paddingBottom="8dp"
-        android:paddingTop="8dp"
-        app:layoutManager="android.support.v7.widget.LinearLayoutManager"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/toolbar"
-        tools:listitem="@layout/blocked_list_item" />
+        app:layout_constraintTop_toBottomOf="@id/toolbar">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <common.widget.PreferenceView
+                android:id="@+id/shouldIAnswer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="8dp"
+                android:paddingTop="8dp"
+                app:layout_constraintTop_toBottomOf="@id/toolbar"
+                app:summary="@string/settings_should_i_answer_summary"
+                app:title="@string/settings_should_i_answer_title"
+                app:widget="@layout/settings_switch_widget" />
+
+            <common.widget.Separator
+                android:layout_width="match_parent"
+                android:layout_height="1dp" />
+
+            <android.support.v7.widget.RecyclerView
+                android:id="@+id/conversations"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="8dp"
+                android:paddingTop="8dp"
+                app:layoutManager="android.support.v7.widget.LinearLayoutManager"
+                tools:listitem="@layout/blocked_list_item" />
+
+        </LinearLayout>
+
+    </android.support.v4.widget.NestedScrollView>
 
     <View
         android:layout_width="match_parent"
diff --git a/presentation/src/main/res/layout/toolbar.xml b/presentation/src/main/res/layout/toolbar.xml
index 9033baab..09416ab4 100644
--- a/presentation/src/main/res/layout/toolbar.xml
+++ b/presentation/src/main/res/layout/toolbar.xml
@@ -20,7 +20,8 @@
 <android.support.v7.widget.Toolbar android:id="@+id/toolbar"
     style="@style/Toolbar"
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:background="@color/white">
 
     <common.widget.QkTextView
         android:id="@+id/toolbarTitle"
diff --git a/presentation/src/main/res/values/strings.xml b/presentation/src/main/res/values/strings.xml
index 65cfa334..29372d16 100644
--- a/presentation/src/main/res/values/strings.xml
+++ b/presentation/src/main/res/values/strings.xml
@@ -92,7 +92,10 @@
     <string name="settings_notifications_title">Notifications</string>
     <string name="settings_vibration_title">Vibration</string>
     <string name="settings_ringtone_title">Sound</string>
-    <string name="settings_blocking_title">Blocked</string>
+    <string name="settings_blocking_title">Blocking</string>
+    <!-- Do not translate -->
+    <string name="settings_should_i_answer_title">Should I Answer?</string>
+    <string name="settings_should_i_answer_summary">Automatically filter messages from unsolicited numbers by using the \"Should I Answer\" app</string>
     <string name="settings_delivery_title">Delivery confirmations</string>
     <string name="settings_delivery_summary">Confirm that messages were sent successfully</string>
     <string name="settings_qkreply_title">QK Reply</string>
@@ -105,7 +108,7 @@
     <string name="settings_sync_title">Sync messages</string>
     <string name="settings_sync_summary">Re-sync your messages with the native Android SMS database</string>
 
-    <string name="blocked_title">Blocked</string>
+    <string name="blocked_title">Blocking</string>
     <string name="blocked_empty">Your blocked conversations will appear here</string>
     <string name="blocked_unblock_dialog_title">Unblock</string>
     <string name="blocked_unblock_dialog_message">Would you like to unblock this conversation?</string>