diff --git a/shared.gradle b/shared.gradle
index c82c3db..a56cf95 100644
--- a/shared.gradle
+++ b/shared.gradle
@@ -22,7 +22,6 @@ dependencies {
 
     // Google common
     implementation 'com.google.guava:guava:22.0'
-    implementation 'com.google.android.gms:play-services-vision:20.1.3'
     implementation 'com.google.android.material:material:1.1.0'
 
     // Support library
diff --git a/talkback/src/main/AndroidManifest.xml b/talkback/src/main/AndroidManifest.xml
index 7fd86dd..e60201a 100644
--- a/talkback/src/main/AndroidManifest.xml
+++ b/talkback/src/main/AndroidManifest.xml
@@ -55,10 +55,6 @@
     <!-- Required for App Enumeration -->
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
 
-    <!-- Required for sending data to Google Analytics. -->
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
     <!-- Required for reading bluetooth headphone state. -->
@@ -67,12 +63,6 @@
     <!-- Required for calling Service.startForeground after API 28. -->
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
-    <!-- Required for Primes. -->
-    <uses-permission android:name="android.permission.GET_PACKAGE_SIZE" />
-
-    <!-- Used to control Primes collection using Gservices flags -->
-    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
-
     <!-- Hardware compatibility. -->
     <uses-feature
         android:name="android.hardware.touchscreen"
diff --git a/talkback/src/main/java/com/android/talkback/TalkBackPreferencesActivity.java b/talkback/src/main/java/com/android/talkback/TalkBackPreferencesActivity.java
index 5776e16..a395302 100644
--- a/talkback/src/main/java/com/android/talkback/TalkBackPreferencesActivity.java
+++ b/talkback/src/main/java/com/android/talkback/TalkBackPreferencesActivity.java
@@ -112,19 +112,11 @@ public class TalkBackPreferencesActivity extends BasePreferencesActivity {
       assignNewFeaturesIntent();
       updateSpeakPasswordsPreference();
 
-      showTalkBackVersion();
-
       if (SettingsUtils.allowLinksOutOfSettings(context)) {
         assignTtsSettingsIntent();
-
-        // We should never try to open the play store in WebActivity.
-        assignPlayStoreIntentToPreference(R.string.pref_play_store_key);
       } else {
         // During setup, do not allow access to web.
-        PreferenceSettingsUtils.hidePreference(
-            context, getPreferenceScreen(), R.string.pref_play_store_key);
         removeCategory(R.string.pref_category_legal_and_privacy_key);
-
         // During setup, do not allow access to other apps via custom-labeling.
         removePreference(R.string.pref_category_advanced_key, R.string.pref_manage_labels_key);
 
@@ -170,38 +162,6 @@ public class TalkBackPreferencesActivity extends BasePreferencesActivity {
       }
     }
 
-    private void assignPlayStoreIntentToPreference(int preferenceId) {
-      final Preference pref = findPreferenceByResId(preferenceId);
-      if (pref == null) {
-        return;
-      }
-      String packageName = PackageManagerUtils.TALBACK_PACKAGE;
-
-      // Only for watches, try the "market://" URL first. If there is a Play Store on the
-      // device, this should succeed. Only for LE devices, there will be no Play Store.
-      if (isWatch) {
-        Uri uri = Uri.parse("market://details?id=" + packageName);
-        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
-        if (canHandleIntent(intent)) {
-          pref.setIntent(intent);
-          return;
-        }
-      }
-
-      Uri uri = Uri.parse("https://play.google.com/store/apps/details?id=" + packageName);
-      Intent intent = new Intent(Intent.ACTION_VIEW, uri);
-      if (isWatch) {
-        // The play.google.com URL goes to ClockworkHome which needs an extra permission,
-        // just redirect to the phone.
-        intent = RemoteIntentUtils.intentToOpenUriOnPhone(uri);
-      } else if (!canHandleIntent(intent)) {
-        getPreferenceScreen().removePreference(pref);
-        return;
-      }
-
-      pref.setIntent(intent);
-    }
-
     private boolean canHandleIntent(Intent intent) {
       Activity activity = getActivity();
       if (activity == null) {
@@ -285,32 +245,6 @@ public class TalkBackPreferencesActivity extends BasePreferencesActivity {
       }
     }
 
-    /** Show TalkBack version in the Play Store button. */
-    private void showTalkBackVersion() {
-      Activity activity = getActivity();
-      if (activity == null) {
-        return;
-      }
-      PackageInfo packageInfo = getPackageInfo(activity);
-      if (packageInfo == null) {
-        return;
-      }
-      final Preference playStoreButton = findPreferenceByResId(R.string.pref_play_store_key);
-      if (playStoreButton == null) {
-        return;
-      }
-      Pattern pattern = Pattern.compile("[0-9]+\\.[0-9]+");
-      Matcher matcher = pattern.matcher(String.valueOf(packageInfo.versionName));
-      String summary;
-      if (matcher.find()) {
-        summary = getString(R.string.summary_pref_play_store, matcher.group());
-      } else {
-        summary =
-            getString(R.string.summary_pref_play_store, String.valueOf(packageInfo.versionName));
-      }
-      playStoreButton.setSummary(summary);
-    }
-
     /**
      * Returns the preference associated with the specified resource identifier.
      *
diff --git a/talkback/src/main/java/com/google/android/accessibility/talkback/TalkBackService.java b/talkback/src/main/java/com/google/android/accessibility/talkback/TalkBackService.java
index 5793173..57a9977 100644
--- a/talkback/src/main/java/com/google/android/accessibility/talkback/TalkBackService.java
+++ b/talkback/src/main/java/com/google/android/accessibility/talkback/TalkBackService.java
@@ -71,7 +71,6 @@ import com.google.android.accessibility.brailleime.TalkBackForBrailleIme;
 import com.google.android.accessibility.compositor.Compositor;
 import com.google.android.accessibility.compositor.EventFilter;
 import com.google.android.accessibility.compositor.GlobalVariables;
-import com.google.android.accessibility.talkback.PrimesController.Timer;
 import com.google.android.accessibility.talkback.actor.AutoScrollActor;
 import com.google.android.accessibility.talkback.actor.DimScreenActor;
 import com.google.android.accessibility.talkback.actor.DirectionNavigationActor;
@@ -381,7 +380,6 @@ public class TalkBackService extends AccessibilityService
 
   private GestureShortcutMapping gestureShortcutMapping;
   private NodeMenuRuleProcessor nodeMenuRuleProcessor;
-  private PrimesController primesController;
   private SpeechLanguage speechLanguage;
   private boolean isBrailleKeyboardActivated;
 
@@ -740,7 +738,6 @@ public class TalkBackService extends AccessibilityService
     }
     Performance perf = Performance.getInstance();
     EventId eventId = perf.onGestureEventReceived(gestureId);
-    primesController.startTimer(Timer.GESTURE_EVENT);
 
     analytics.onGesture(gestureId);
     feedbackController.playAuditory(R.raw.gesture_end, eventId);
@@ -751,7 +748,6 @@ public class TalkBackService extends AccessibilityService
     // Preceding event handling frequently initiates a framework action, which in turn
     // cascades a focus event, which in turn generates feedback.
     perf.onHandlerDone(eventId);
-    primesController.stopTimer(Timer.GESTURE_EVENT);
     return true;
   }
 
@@ -931,10 +927,6 @@ public class TalkBackService extends AccessibilityService
   protected void onServiceConnected() {
     LogUtils.v(TAG, "System bound to service.");
 
-    primesController = new PrimesController();
-    primesController.initialize(getApplication());
-    primesController.startTimer(Timer.START_UP);
-
     SharedPreferencesUtils.migrateSharedPreferences(this);
     prefs = SharedPreferencesUtils.getSharedPreferences(this);
     initializeInfrastructure();
@@ -996,8 +988,6 @@ public class TalkBackService extends AccessibilityService
     if (!FeatureSupport.isTv(getApplicationContext())) {
       OnboardingInitiator.showOnboarding91IfNecessary(this);
     }
-
-    primesController.stopTimer(Timer.START_UP);
   }
 
   /**
@@ -1182,7 +1172,7 @@ public class TalkBackService extends AccessibilityService
     dimScreenController = new DimScreenActor(this, gestureShortcutMapping);
 
     accessibilityFocusInterpreter =
-        new AccessibilityFocusInterpreter(focusFinder, accessibilityFocusMonitor, primesController);
+        new AccessibilityFocusInterpreter(focusFinder, accessibilityFocusMonitor);
 
     proximitySensorListener = new ProximitySensorListener(/* service= */ this);
     speechLanguage = new SpeechLanguage();
@@ -1230,7 +1220,7 @@ public class TalkBackService extends AccessibilityService
                 feedbackController,
                 scroller,
                 focuser,
-                new FocusActorForScreenStateChange(focusFinder, primesController),
+                new FocusActorForScreenStateChange(focusFinder),
                 new FocusActorForTapAndTouchExploration(),
                 directionNavigationActor,
                 new SearchScreenNodeStrategy(/* observer= */ null, labelManager),
diff --git a/talkback/src/main/java/com/google/android/accessibility/talkback/actor/FocusActorForScreenStateChange.java b/talkback/src/main/java/com/google/android/accessibility/talkback/actor/FocusActorForScreenStateChange.java
index 80914fc..14bb0bc 100644
--- a/talkback/src/main/java/com/google/android/accessibility/talkback/actor/FocusActorForScreenStateChange.java
+++ b/talkback/src/main/java/com/google/android/accessibility/talkback/actor/FocusActorForScreenStateChange.java
@@ -25,8 +25,6 @@ import android.view.accessibility.AccessibilityWindowInfo;
 import com.google.android.accessibility.talkback.ActorState;
 import com.google.android.accessibility.talkback.Feedback;
 import com.google.android.accessibility.talkback.Pipeline;
-import com.google.android.accessibility.talkback.PrimesController;
-import com.google.android.accessibility.talkback.PrimesController.Timer;
 import com.google.android.accessibility.talkback.focusmanagement.NavigationTarget;
 import com.google.android.accessibility.talkback.focusmanagement.interpreter.ScreenState;
 import com.google.android.accessibility.talkback.focusmanagement.record.AccessibilityFocusActionHistory;
@@ -72,7 +70,6 @@ public class FocusActorForScreenStateChange {
 
   private Pipeline.FeedbackReturner pipeline;
   private ActorState actorState;
-  private final PrimesController primesController;
 
   private final FocusFinder focusFinder;
 
@@ -80,8 +77,7 @@ public class FocusActorForScreenStateChange {
   // Construction methods
 
   public FocusActorForScreenStateChange(
-      FocusFinder focusFinder, PrimesController primesController) {
-    this.primesController = primesController;
+      FocusFinder focusFinder) {
     this.focusFinder = focusFinder;
   }
 
@@ -104,7 +100,6 @@ public class FocusActorForScreenStateChange {
       return false;
     }
 
-    primesController.startTimer(Timer.INITIAL_FOCUS_RESTORE);
     AccessibilityNodeInfoCompat root = null;
     AccessibilityNodeInfoCompat nodeToRestoreFocus = null;
     try {
@@ -149,7 +144,6 @@ public class FocusActorForScreenStateChange {
 
     } finally {
       AccessibilityNodeInfoUtils.recycleNodes(root, nodeToRestoreFocus);
-      primesController.stopTimer(Timer.INITIAL_FOCUS_RESTORE);
     }
   }
 
@@ -182,7 +176,6 @@ public class FocusActorForScreenStateChange {
   /** Sets accessibility focus to EditText in the active window. */
   public boolean syncA11yFocusToInputFocusedEditText(ScreenState screenState, EventId eventId) {
 
-    primesController.startTimer(Timer.INITIAL_FOCUS_FOLLOW_INPUT);
     AccessibilityNodeInfoCompat inputFocusedNode = null;
     try {
       inputFocusedNode = focusFinder.findFocusCompat(FOCUS_INPUT);
@@ -193,7 +186,6 @@ public class FocusActorForScreenStateChange {
               eventId, Feedback.focus(inputFocusedNode, FOCUS_ACTION_INFO_SYNCED_EDIT_TEXT));
     } finally {
       AccessibilityNodeInfoUtils.recycleNodes(inputFocusedNode);
-      primesController.stopTimer(Timer.INITIAL_FOCUS_FOLLOW_INPUT);
     }
   }
 
@@ -205,7 +197,6 @@ public class FocusActorForScreenStateChange {
       return false;
     }
 
-    primesController.startTimer(Timer.INITIAL_FOCUS_FIRST_CONTENT);
     AccessibilityNodeInfoCompat root = null;
     AccessibilityNodeInfoCompat nodeToFocus = null;
     TraversalStrategy traversalStrategy = null;
@@ -259,7 +250,6 @@ public class FocusActorForScreenStateChange {
     } finally {
       AccessibilityNodeInfoUtils.recycleNodes(nodeToFocus, root);
       TraversalStrategyUtils.recycle(traversalStrategy);
-      primesController.stopTimer(Timer.INITIAL_FOCUS_FIRST_CONTENT);
     }
   }
 
diff --git a/talkback/src/main/java/com/google/android/accessibility/talkback/interpreters/AccessibilityFocusInterpreter.java b/talkback/src/main/java/com/google/android/accessibility/talkback/interpreters/AccessibilityFocusInterpreter.java
index 604bdb3..b0b25ae 100644
--- a/talkback/src/main/java/com/google/android/accessibility/talkback/interpreters/AccessibilityFocusInterpreter.java
+++ b/talkback/src/main/java/com/google/android/accessibility/talkback/interpreters/AccessibilityFocusInterpreter.java
@@ -26,7 +26,6 @@ import com.google.android.accessibility.compositor.AccessibilityFocusEventInterp
 import com.google.android.accessibility.talkback.ActorState;
 import com.google.android.accessibility.talkback.Interpretation;
 import com.google.android.accessibility.talkback.Pipeline;
-import com.google.android.accessibility.talkback.PrimesController;
 import com.google.android.accessibility.talkback.ScrollEventInterpreter;
 import com.google.android.accessibility.talkback.ScrollEventInterpreter.ScrollEventHandler;
 import com.google.android.accessibility.talkback.ScrollEventInterpreter.ScrollEventInterpretation;
@@ -74,8 +73,7 @@ public class AccessibilityFocusInterpreter
 
   public AccessibilityFocusInterpreter(
       FocusFinder focusFinder,
-      AccessibilityFocusMonitor accessibilityFocusMonitor,
-      PrimesController primesController) {
+      AccessibilityFocusMonitor accessibilityFocusMonitor) {
 
     this.accessibilityFocusMonitor = accessibilityFocusMonitor;
 
diff --git a/talkback/src/main/res/xml/preferences.xml b/talkback/src/main/res/xml/preferences.xml
index f45bef3..f2701b1 100644
--- a/talkback/src/main/res/xml/preferences.xml
+++ b/talkback/src/main/res/xml/preferences.xml
@@ -71,8 +71,4 @@
         android:title="@string/title_pref_advanced_settings">
         <intent android:action=".preference.TalkBackAdvancedPreferencesActivity" />
     </Preference>
-    <Preference
-        android:key="@string/pref_play_store_key"
-        android:title="@string/title_pref_play_store">
-    </Preference>
 </PreferenceScreen>
diff --git a/utils/src/main/java/com/google/android/accessibility/utils/PackageManagerUtils.java b/utils/src/main/java/com/google/android/accessibility/utils/PackageManagerUtils.java
index dc1a107..654ee50 100644
--- a/utils/src/main/java/com/google/android/accessibility/utils/PackageManagerUtils.java
+++ b/utils/src/main/java/com/google/android/accessibility/utils/PackageManagerUtils.java
@@ -38,11 +38,6 @@ public class PackageManagerUtils {
   public static final String TALKBACK_SERVICE_NAME =
       "com.google.android.marvin.talkback.TalkBackService";
 
-  /** gmscore-package-name constants */
-  private static final String GMSCORE_PACKAGE_NAME = "com.google.android.gms";
-
-  private static final int MIN_GMSCORE_VERSION = 9200000; // Version should be at least V4.
-
   /**
    * @return The package version code or {@link #INVALID_VERSION_CODE} if the package does not
    *     exist.
@@ -98,7 +93,7 @@ public class PackageManagerUtils {
 
   /** Returns {@code true} if the package supports help and feedback. */
   public static boolean supportsHelpAndFeedback(Context context) {
-    return getVersionCode(context, GMSCORE_PACKAGE_NAME) > MIN_GMSCORE_VERSION;
+    return false;
   }
 
   private static @Nullable PackageInfo getPackageInfo(Context context, CharSequence packageName) {