diff --git a/app/src/main/java/com/todoroo/astrid/service/TaskCompleter.kt b/app/src/main/java/com/todoroo/astrid/service/TaskCompleter.kt
index 01c104c97..1a9c9bc7a 100644
--- a/app/src/main/java/com/todoroo/astrid/service/TaskCompleter.kt
+++ b/app/src/main/java/com/todoroo/astrid/service/TaskCompleter.kt
@@ -1,16 +1,25 @@
 package com.todoroo.astrid.service
 
+import android.app.NotificationManager
+import android.app.NotificationManager.INTERRUPTION_FILTER_ALL
+import android.content.Context
+import android.media.MediaPlayer
 import com.todoroo.andlib.utility.DateUtilities
 import com.todoroo.astrid.dao.TaskDao
 import com.todoroo.astrid.data.Task
+import dagger.hilt.android.qualifiers.ApplicationContext
 import org.tasks.data.GoogleTaskDao
+import org.tasks.preferences.Preferences
 import timber.log.Timber
 import javax.inject.Inject
 
 class TaskCompleter @Inject internal constructor(
-        private val taskDao: TaskDao,
-        private val googleTaskDao: GoogleTaskDao) {
-
+    @ApplicationContext private val context: Context,
+    private val taskDao: TaskDao,
+    private val googleTaskDao: GoogleTaskDao,
+    private val preferences: Preferences,
+    private val notificationManager: NotificationManager,
+) {
     suspend fun setComplete(taskId: Long) =
             taskDao
                     .fetch(taskId)
@@ -43,5 +52,15 @@ class TaskCompleter @Inject internal constructor(
             }
             taskDao.save(task)
         }
+        if (
+            tasks.size == 1 &&
+            completionDate > 0 &&
+            notificationManager.currentInterruptionFilter == INTERRUPTION_FILTER_ALL
+        ) {
+            preferences
+                .completionSound
+                ?.takeUnless { preferences.isCurrentlyQuietHours }
+                ?.let { MediaPlayer.create(context, it).start() }
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/tasks/extensions/Context.kt b/app/src/main/java/org/tasks/extensions/Context.kt
index 73cb53648..f45cb50cf 100644
--- a/app/src/main/java/org/tasks/extensions/Context.kt
+++ b/app/src/main/java/org/tasks/extensions/Context.kt
@@ -1,11 +1,13 @@
 package org.tasks.extensions
 
 import android.content.ActivityNotFoundException
+import android.content.ContentResolver
 import android.content.Context
 import android.content.Intent
 import android.content.Intent.ACTION_VIEW
 import android.net.Uri
 import android.widget.Toast
+import androidx.annotation.AnyRes
 import androidx.browser.customtabs.CustomTabsIntent
 import org.tasks.R
 
@@ -46,4 +48,11 @@ object Context {
 
     fun Context.toast(text: String?, duration: Int = Toast.LENGTH_LONG) =
         text?.let { Toast.makeText(this, it, duration).show() }
+
+    fun Context.getResourceUri(@AnyRes res: Int) =
+        Uri.Builder()
+            .scheme(ContentResolver.SCHEME_ANDROID_RESOURCE)
+            .authority(packageName)
+            .path(res.toString())
+            .build()
 }
diff --git a/app/src/main/java/org/tasks/injection/ApplicationModule.kt b/app/src/main/java/org/tasks/injection/ApplicationModule.kt
index 0358b9fdb..0a7cec470 100644
--- a/app/src/main/java/org/tasks/injection/ApplicationModule.kt
+++ b/app/src/main/java/org/tasks/injection/ApplicationModule.kt
@@ -1,5 +1,6 @@
 package org.tasks.injection
 
+import android.app.NotificationManager
 import android.content.Context
 import com.todoroo.astrid.dao.Database
 import dagger.Module
@@ -113,4 +114,8 @@ class ApplicationModule {
     fun providesCoroutineScope(
         @DefaultDispatcher defaultDispatcher: CoroutineDispatcher
     ): CoroutineScope = CoroutineScope(SupervisorJob() + defaultDispatcher)
+
+    @Provides
+    fun providesNotificationManager(@ApplicationContext context: Context) =
+        context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/tasks/preferences/Preferences.kt b/app/src/main/java/org/tasks/preferences/Preferences.kt
index 6b7d86b54..448af898d 100644
--- a/app/src/main/java/org/tasks/preferences/Preferences.kt
+++ b/app/src/main/java/org/tasks/preferences/Preferences.kt
@@ -10,6 +10,7 @@ import android.media.RingtoneManager
 import android.net.Uri
 import android.os.Binder
 import androidx.core.app.NotificationCompat
+import androidx.core.net.toUri
 import androidx.documentfile.provider.DocumentFile
 import androidx.preference.PreferenceManager
 import com.todoroo.andlib.utility.DateUtilities
@@ -25,6 +26,7 @@ import org.tasks.R
 import org.tasks.Strings.isNullOrEmpty
 import org.tasks.billing.Purchase
 import org.tasks.data.TaskAttachment
+import org.tasks.extensions.Context.getResourceUri
 import org.tasks.themes.ColorProvider
 import org.tasks.themes.ThemeBase
 import org.tasks.time.DateTime
@@ -141,13 +143,25 @@ class Preferences @JvmOverloads constructor(
         }
 
     val ringtone: Uri?
-        get() {
-            val ringtone = getStringValue(R.string.p_rmd_ringtone)
-                    ?: return RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
-            return if ("" == ringtone) {
-                null
-            } else Uri.parse(ringtone)
+        get() = getRingtone(
+            R.string.p_rmd_ringtone,
+            RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
+        )
+
+    val completionSound: Uri?
+        get() = getRingtone(
+            R.string.p_completion_ringtone,
+            context.getResourceUri(R.raw.long_rising_tone)
+        )
+
+    private fun getRingtone(pref: Int, default: Uri): Uri? {
+        val ringtone = getStringValue(pref)
+        return when {
+            ringtone == null -> default
+            ringtone.isNotBlank() -> ringtone.toUri()
+            else -> null
         }
+    }
 
     val isTrackingEnabled: Boolean
         get() = getBoolean(R.string.p_collect_statistics, true)
diff --git a/app/src/main/java/org/tasks/preferences/fragments/Notifications.kt b/app/src/main/java/org/tasks/preferences/fragments/Notifications.kt
index c2607bdf3..206db5310 100644
--- a/app/src/main/java/org/tasks/preferences/fragments/Notifications.kt
+++ b/app/src/main/java/org/tasks/preferences/fragments/Notifications.kt
@@ -9,6 +9,7 @@ import android.os.Bundle
 import android.os.PowerManager
 import android.provider.Settings
 import android.speech.tts.TextToSpeech
+import androidx.core.net.toUri
 import androidx.lifecycle.lifecycleScope
 import androidx.preference.Preference
 import androidx.preference.SwitchPreferenceCompat
@@ -21,6 +22,7 @@ import org.tasks.LocalBroadcastManager
 import org.tasks.R
 import org.tasks.activities.FilterSelectionActivity
 import org.tasks.dialogs.MyTimePickerDialog.Companion.newTimePicker
+import org.tasks.extensions.Context.getResourceUri
 import org.tasks.injection.InjectingPreferenceFragment
 import org.tasks.preferences.DefaultFilterProvider
 import org.tasks.preferences.Preferences
@@ -37,6 +39,7 @@ private const val REQUEST_DEFAULT_REMIND = 10003
 private const val REQUEST_BADGE_LIST = 10004
 private const val REQUEST_CODE_ALERT_RINGTONE = 10005
 private const val REQUEST_CODE_TTS_CHECK = 10006
+private const val REQUEST_CODE_COMPLETION_SOUND = 10007
 
 @AndroidEntryPoint
 class Notifications : InjectingPreferenceFragment() {
@@ -59,6 +62,7 @@ class Notifications : InjectingPreferenceFragment() {
         rescheduleNotificationsOnChange(true, R.string.p_bundle_notifications)
 
         initializeRingtonePreference()
+        initializeCompletionSoundPreference()
         initializeTimePreference(getDefaultRemindTimePreference()!!, REQUEST_DEFAULT_REMIND)
         initializeTimePreference(getQuietStartPreference()!!, REQUEST_QUIET_START)
         initializeTimePreference(getQuietEndPreference()!!, REQUEST_QUIET_END)
@@ -175,19 +179,27 @@ class Notifications : InjectingPreferenceFragment() {
     }
 
     override fun onPreferenceTreeClick(preference: Preference?): Boolean =
-            if (preference!!.key == getString(R.string.p_rmd_ringtone)) {
+        when (preference!!.key) {
+            getString(R.string.p_rmd_ringtone),
+            getString(R.string.p_completion_ringtone) -> {
                 val intent = Intent(RingtoneManager.ACTION_RINGTONE_PICKER)
-                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION)
+                intent.putExtra(
+                    RingtoneManager.EXTRA_RINGTONE_TYPE,
+                    RingtoneManager.TYPE_NOTIFICATION
+                )
                 intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true)
                 intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true)
                 intent.putExtra(
                     RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI,
                     Settings.System.DEFAULT_NOTIFICATION_URI
                 )
-                val existingValue: String? = preferences.getStringValue(R.string.p_rmd_ringtone)
+                val existingValue: String? = preferences.getStringValue(preference.key)
                 if (existingValue != null) {
                     if (existingValue.isEmpty()) {
-                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, null as Uri?)
+                        intent.putExtra(
+                            RingtoneManager.EXTRA_RINGTONE_EXISTING_URI,
+                            null as Uri?
+                        )
                     } else {
                         intent.putExtra(
                             RingtoneManager.EXTRA_RINGTONE_EXISTING_URI,
@@ -200,11 +212,20 @@ class Notifications : InjectingPreferenceFragment() {
                         Settings.System.DEFAULT_NOTIFICATION_URI
                     )
                 }
-                startActivityForResult(intent, REQUEST_CODE_ALERT_RINGTONE)
+                startActivityForResult(
+                    intent,
+                    if (preference.key == getString(R.string.p_rmd_ringtone)) {
+                        REQUEST_CODE_ALERT_RINGTONE
+                    } else {
+                        REQUEST_CODE_COMPLETION_SOUND
+                    }
+                )
                 true
-            } else {
+            }
+            else -> {
                 super.onPreferenceTreeClick(preference)
             }
+        }
 
     private fun getQuietStartPreference(): TimePreference? =
             getTimePreference(R.string.p_rmd_quietStart)
@@ -227,29 +248,41 @@ class Notifications : InjectingPreferenceFragment() {
         }
     }
 
-    private fun initializeRingtonePreference() {
+    private fun initializeRingtonePreference() =
+        initializeRingtonePreference(
+            R.string.p_rmd_ringtone,
+            R.string.silent,
+        )
+
+    private fun initializeCompletionSoundPreference() =
+        initializeRingtonePreference(
+            R.string.p_completion_ringtone,
+            R.string.none,
+            requireContext().getResourceUri(R.raw.long_rising_tone)
+        )
+
+    private fun initializeRingtonePreference(pref: Int, noneRes: Int, default: Uri? = null) {
         val ringtoneChangedListener =
             Preference.OnPreferenceChangeListener { preference: Preference, value: Any? ->
                 if ("" == value) {
-                    preference.setSummary(R.string.silent)
+                    preference.setSummary(noneRes)
                 } else {
-                    val ringtone = RingtoneManager.getRingtone(
-                        context,
-                        if (value == null) Settings.System.DEFAULT_NOTIFICATION_URI else Uri.parse(
-                            value as String?
-                        )
-                    )
-                    preference.summary = if (ringtone == null) "" else ringtone.getTitle(context)
+                    val uri =
+                        (value as? String?)?.toUri()
+                            ?: default
+                            ?: Settings.System.DEFAULT_RINGTONE_URI
+                    preference.summary = if (uri == default) {
+                        getString(R.string.settings_default)
+                    } else {
+                        RingtoneManager.getRingtone(context, uri).getTitle(context)
+                    }
                 }
                 true
             }
-        val ringtoneKey = R.string.p_rmd_ringtone
-        val ringtonePreference: Preference = findPreference(ringtoneKey)
+        val ringtonePreference = findPreference(pref)
         ringtonePreference.onPreferenceChangeListener = ringtoneChangedListener
-        ringtoneChangedListener.onPreferenceChange(
-            ringtonePreference,
-            preferences.getStringValue(ringtoneKey)
-        )
+        ringtoneChangedListener
+            .onPreferenceChange(ringtonePreference, preferences.getStringValue(pref))
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
@@ -264,6 +297,16 @@ class Notifications : InjectingPreferenceFragment() {
                 }
                 initializeRingtonePreference()
             }
+            REQUEST_CODE_COMPLETION_SOUND -> if (resultCode == RESULT_OK && data != null) {
+                val ringtone: Uri? =
+                    data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI)
+                if (ringtone != null) {
+                    preferences.setString(R.string.p_completion_ringtone, ringtone.toString())
+                } else {
+                    preferences.setString(R.string.p_completion_ringtone, "")
+                }
+                initializeCompletionSoundPreference()
+            }
             REQUEST_QUIET_START -> if (resultCode == RESULT_OK) {
                 getQuietStartPreference()!!.handleTimePickerActivityIntent(data)
             }
diff --git a/app/src/main/res/raw/long_rising_tone.m4a b/app/src/main/res/raw/long_rising_tone.m4a
new file mode 100644
index 000000000..ef870a296
Binary files /dev/null and b/app/src/main/res/raw/long_rising_tone.m4a differ
diff --git a/app/src/main/res/values/keys.xml b/app/src/main/res/values/keys.xml
index bf65d1f65..2f4f24682 100644
--- a/app/src/main/res/values/keys.xml
+++ b/app/src/main/res/values/keys.xml
@@ -72,6 +72,7 @@
 
   <!-- ringtone to use for notifications -->
   <string name="p_rmd_ringtone">notification_ringtone</string>
+  <string name="p_completion_ringtone">completion_ringtone</string>
 
   <!-- default random reminder setting (in hours) -->
   <string name="p_rmd_default_random_hours">notif_default_reminder</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7f4c8a2ac..841b84b79 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -712,4 +712,5 @@ File %1$s contained %2$s.\n\n
   <string name="more_options">More options</string>
   <string name="markdown">Markdown</string>
   <string name="markdown_description">Enable Markdown in title and description</string>
+  <string name="completion_sound">Play completion sound</string>
 </resources>
diff --git a/app/src/main/res/xml/preferences_notifications.xml b/app/src/main/res/xml/preferences_notifications.xml
index 5e3354f47..2fd77a633 100644
--- a/app/src/main/res/xml/preferences_notifications.xml
+++ b/app/src/main/res/xml/preferences_notifications.xml
@@ -60,6 +60,11 @@
     android:key="@string/p_rmd_ringtone"
     android:title="@string/sound" />
 
+  <Preference
+      android:defaultValue="content://settings/system/notification_sound"
+      android:key="@string/p_completion_ringtone"
+      android:title="@string/completion_sound" />
+
   <SwitchPreferenceCompat
     android:defaultValue="true"
     android:dependency="@string/p_rmd_enabled"