diff --git a/packages/react-native/ReactAndroid/api/ReactAndroid.api b/packages/react-native/ReactAndroid/api/ReactAndroid.api
index 4fe7fc8edb4708..e9f3254c9efb19 100644
--- a/packages/react-native/ReactAndroid/api/ReactAndroid.api
+++ b/packages/react-native/ReactAndroid/api/ReactAndroid.api
@@ -2091,7 +2091,7 @@ public abstract interface class com/facebook/react/devsupport/DevServerHelper$Pa
 	public abstract fun onPackagerReloadCommand ()V
 }
 
-public class com/facebook/react/devsupport/DevSettingsActivity : android/preference/PreferenceActivity {
+public final class com/facebook/react/devsupport/DevSettingsActivity : android/preference/PreferenceActivity {
 	public fun <init> ()V
 	public fun onCreate (Landroid/os/Bundle;)V
 }
@@ -3165,7 +3165,7 @@ public final class com/facebook/react/modules/core/TimingModule : com/facebook/f
 	public fun setSendIdleEvents (Z)V
 }
 
-public class com/facebook/react/modules/debug/DevSettingsModule : com/facebook/fbreact/specs/NativeDevSettingsSpec {
+public final class com/facebook/react/modules/debug/DevSettingsModule : com/facebook/fbreact/specs/NativeDevSettingsSpec {
 	public fun <init> (Lcom/facebook/react/bridge/ReactApplicationContext;Lcom/facebook/react/devsupport/interfaces/DevSupportManager;)V
 	public fun addListener (Ljava/lang/String;)V
 	public fun addMenuItem (Ljava/lang/String;)V
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.java
deleted file mode 100644
index 32ff198161f11d..00000000000000
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.java
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.devsupport;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-import com.facebook.infer.annotation.Nullsafe;
-import com.facebook.react.common.build.ReactBuildConfig;
-import com.facebook.react.modules.debug.interfaces.DeveloperSettings;
-import com.facebook.react.packagerconnection.PackagerConnectionSettings;
-
-/**
- * Helper class for accessing developers settings that can not be accessed outside of the package
- * {@link com.facebook.react.devsupport}. For accessing some of the settings by external modules
- * this class implements an external interface {@link DeveloperSettings}.
- */
-@Nullsafe(Nullsafe.Mode.LOCAL)
-class DevInternalSettings
-    implements DeveloperSettings, SharedPreferences.OnSharedPreferenceChangeListener {
-
-  private static final String PREFS_FPS_DEBUG_KEY = "fps_debug";
-  private static final String PREFS_JS_DEV_MODE_DEBUG_KEY = "js_dev_mode_debug";
-  private static final String PREFS_JS_MINIFY_DEBUG_KEY = "js_minify_debug";
-  private static final String PREFS_ANIMATIONS_DEBUG_KEY = "animations_debug";
-  private static final String PREFS_INSPECTOR_DEBUG_KEY = "inspector_debug";
-  private static final String PREFS_HOT_MODULE_REPLACEMENT_KEY = "hot_module_replacement";
-  private static final String PREFS_REMOTE_JS_DEBUG_KEY = "remote_js_debug";
-  private static final String PREFS_START_SAMPLING_PROFILER_ON_INIT =
-      "start_sampling_profiler_on_init";
-
-  private final SharedPreferences mPreferences;
-  private final Listener mListener;
-  private final PackagerConnectionSettings mPackagerConnectionSettings;
-
-  public DevInternalSettings(Context applicationContext, Listener listener) {
-    mListener = listener;
-    mPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext);
-    mPreferences.registerOnSharedPreferenceChangeListener(this);
-    mPackagerConnectionSettings = new PackagerConnectionSettings(applicationContext);
-  }
-
-  @Override
-  public boolean isFpsDebugEnabled() {
-    return mPreferences.getBoolean(PREFS_FPS_DEBUG_KEY, false);
-  }
-
-  @Override
-  public boolean isAnimationFpsDebugEnabled() {
-    return mPreferences.getBoolean(PREFS_ANIMATIONS_DEBUG_KEY, false);
-  }
-
-  @Override
-  public boolean isJSDevModeEnabled() {
-    return mPreferences.getBoolean(PREFS_JS_DEV_MODE_DEBUG_KEY, true);
-  }
-
-  @Override
-  public boolean isJSMinifyEnabled() {
-    return mPreferences.getBoolean(PREFS_JS_MINIFY_DEBUG_KEY, false);
-  }
-
-  @Override
-  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-    if (mListener != null) {
-      if (PREFS_FPS_DEBUG_KEY.equals(key)
-          || PREFS_JS_DEV_MODE_DEBUG_KEY.equals(key)
-          || PREFS_START_SAMPLING_PROFILER_ON_INIT.equals(key)
-          || PREFS_JS_MINIFY_DEBUG_KEY.equals(key)) {
-        mListener.onInternalSettingsChanged();
-      }
-    }
-  }
-
-  @Override
-  public boolean isElementInspectorEnabled() {
-    return mPreferences.getBoolean(PREFS_INSPECTOR_DEBUG_KEY, false);
-  }
-
-  @Override
-  public boolean isDeviceDebugEnabled() {
-    return ReactBuildConfig.DEBUG;
-  }
-
-  @Override
-  public boolean isRemoteJSDebugEnabled() {
-    return mPreferences.getBoolean(PREFS_REMOTE_JS_DEBUG_KEY, false);
-  }
-
-  @Override
-  public void setRemoteJSDebugEnabled(boolean remoteJSDebugEnabled) {
-    mPreferences.edit().putBoolean(PREFS_REMOTE_JS_DEBUG_KEY, remoteJSDebugEnabled).apply();
-  }
-
-  @Override
-  public boolean isStartSamplingProfilerOnInit() {
-    return mPreferences.getBoolean(PREFS_START_SAMPLING_PROFILER_ON_INIT, false);
-  }
-
-  @Override
-  public void addMenuItem(String title) {
-    // Not supported.
-  }
-
-  void setElementInspectorEnabled(boolean enabled) {
-    mPreferences.edit().putBoolean(PREFS_INSPECTOR_DEBUG_KEY, enabled).apply();
-  }
-
-  boolean isHotModuleReplacementEnabled() {
-    return mPreferences.getBoolean(PREFS_HOT_MODULE_REPLACEMENT_KEY, true);
-  }
-
-  void setHotModuleReplacementEnabled(boolean enabled) {
-    mPreferences.edit().putBoolean(PREFS_HOT_MODULE_REPLACEMENT_KEY, enabled).apply();
-  }
-
-  void setJSDevModeEnabled(boolean value) {
-    mPreferences.edit().putBoolean(PREFS_JS_DEV_MODE_DEBUG_KEY, value).apply();
-  }
-
-  void setFpsDebugEnabled(boolean enabled) {
-    mPreferences.edit().putBoolean(PREFS_FPS_DEBUG_KEY, enabled).apply();
-  }
-
-  PackagerConnectionSettings getPackagerConnectionSettings() {
-    return mPackagerConnectionSettings;
-  }
-
-  public interface Listener {
-    void onInternalSettingsChanged();
-  }
-}
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.kt
new file mode 100644
index 00000000000000..e2cfecf5a81fbc
--- /dev/null
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.kt
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@file:Suppress("DEPRECATION")
+
+package com.facebook.react.devsupport
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener
+import android.preference.PreferenceManager
+import com.facebook.react.common.build.ReactBuildConfig
+import com.facebook.react.modules.debug.interfaces.DeveloperSettings
+import com.facebook.react.packagerconnection.PackagerConnectionSettings
+
+/**
+ * Helper class for accessing developers settings that can not be accessed outside of the package
+ * [com.facebook.react.devsupport]. For accessing some of the settings by external modules this
+ * class implements an external interface [DeveloperSettings].
+ */
+internal class DevInternalSettings(applicationContext: Context, private val listener: Listener?) :
+    DeveloperSettings, OnSharedPreferenceChangeListener {
+  private val preferences: SharedPreferences =
+      PreferenceManager.getDefaultSharedPreferences(applicationContext)
+  val packagerConnectionSettings: PackagerConnectionSettings
+
+  init {
+    preferences.registerOnSharedPreferenceChangeListener(this)
+    packagerConnectionSettings = PackagerConnectionSettings(applicationContext)
+  }
+
+  override fun isFpsDebugEnabled(): Boolean = preferences.getBoolean(PREFS_FPS_DEBUG_KEY, false)
+
+  override fun isAnimationFpsDebugEnabled(): Boolean =
+      preferences.getBoolean(PREFS_ANIMATIONS_DEBUG_KEY, false)
+
+  override fun isJSDevModeEnabled(): Boolean =
+      preferences.getBoolean(PREFS_JS_DEV_MODE_DEBUG_KEY, true)
+
+  override fun isJSMinifyEnabled(): Boolean =
+      preferences.getBoolean(PREFS_JS_MINIFY_DEBUG_KEY, false)
+
+  override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String?) {
+    if (listener != null) {
+      if (PREFS_FPS_DEBUG_KEY == key ||
+          PREFS_JS_DEV_MODE_DEBUG_KEY == key ||
+          PREFS_START_SAMPLING_PROFILER_ON_INIT == key ||
+          PREFS_JS_MINIFY_DEBUG_KEY == key) {
+        listener.onInternalSettingsChanged()
+      }
+    }
+  }
+
+  override fun isElementInspectorEnabled(): Boolean =
+      preferences.getBoolean(PREFS_INSPECTOR_DEBUG_KEY, false)
+
+  override fun isDeviceDebugEnabled(): Boolean = ReactBuildConfig.DEBUG
+
+  override fun isRemoteJSDebugEnabled(): Boolean =
+      preferences.getBoolean(PREFS_REMOTE_JS_DEBUG_KEY, false)
+
+  override fun setRemoteJSDebugEnabled(remoteJSDebugEnabled: Boolean) {
+    preferences.edit().putBoolean(PREFS_REMOTE_JS_DEBUG_KEY, remoteJSDebugEnabled).apply()
+  }
+
+  override fun isStartSamplingProfilerOnInit(): Boolean =
+      preferences.getBoolean(PREFS_START_SAMPLING_PROFILER_ON_INIT, false)
+
+  // Not supported.
+  override fun addMenuItem(title: String) = Unit
+
+  fun setElementInspectorEnabled(enabled: Boolean) {
+    preferences.edit().putBoolean(PREFS_INSPECTOR_DEBUG_KEY, enabled).apply()
+  }
+
+  var isHotModuleReplacementEnabled: Boolean
+    get() = preferences.getBoolean(PREFS_HOT_MODULE_REPLACEMENT_KEY, true)
+    set(enabled) {
+      preferences.edit().putBoolean(PREFS_HOT_MODULE_REPLACEMENT_KEY, enabled).apply()
+    }
+
+  fun setJSDevModeEnabled(value: Boolean) {
+    preferences.edit().putBoolean(PREFS_JS_DEV_MODE_DEBUG_KEY, value).apply()
+  }
+
+  fun setFpsDebugEnabled(enabled: Boolean) {
+    preferences.edit().putBoolean(PREFS_FPS_DEBUG_KEY, enabled).apply()
+  }
+
+  interface Listener {
+    fun onInternalSettingsChanged()
+  }
+
+  companion object {
+    private const val PREFS_FPS_DEBUG_KEY = "fps_debug"
+    private const val PREFS_JS_DEV_MODE_DEBUG_KEY = "js_dev_mode_debug"
+    private const val PREFS_JS_MINIFY_DEBUG_KEY = "js_minify_debug"
+    private const val PREFS_ANIMATIONS_DEBUG_KEY = "animations_debug"
+    private const val PREFS_INSPECTOR_DEBUG_KEY = "inspector_debug"
+    private const val PREFS_HOT_MODULE_REPLACEMENT_KEY = "hot_module_replacement"
+    private const val PREFS_REMOTE_JS_DEBUG_KEY = "remote_js_debug"
+    private const val PREFS_START_SAMPLING_PROFILER_ON_INIT = "start_sampling_profiler_on_init"
+  }
+}
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.java
deleted file mode 100644
index d6a5b314c54d50..00000000000000
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.devsupport;
-
-import android.os.Bundle;
-import android.preference.PreferenceActivity;
-import com.facebook.infer.annotation.Nullsafe;
-import com.facebook.react.R;
-
-/**
- * Activity that display developers settings. Should be added to the debug manifest of the app. Can
- * be triggered through the developers option menu displayed by {@link DevSupportManager}.
- */
-@Nullsafe(Nullsafe.Mode.LOCAL)
-public class DevSettingsActivity extends PreferenceActivity {
-
-  @Override
-  public void onCreate(Bundle savedInstanceState) {
-    super.onCreate(savedInstanceState);
-    setTitle(getApplication().getResources().getString(R.string.catalyst_settings_title));
-    addPreferencesFromResource(R.xml.rn_dev_preferences);
-  }
-}
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.kt
new file mode 100644
index 00000000000000..f19f7b52d439e0
--- /dev/null
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSettingsActivity.kt
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@file:Suppress("DEPRECATION")
+
+package com.facebook.react.devsupport
+
+import android.os.Bundle
+import android.preference.PreferenceActivity
+import com.facebook.react.R
+
+/**
+ * Activity that display developers settings. Should be added to the debug manifest of the app. Can
+ * be triggered through the developers option menu displayed by [DevSupportManager].
+ */
+public class DevSettingsActivity : PreferenceActivity() {
+  public override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    title = application.resources.getString(R.string.catalyst_settings_title)
+    addPreferencesFromResource(R.xml.rn_dev_preferences)
+  }
+}
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java
deleted file mode 100644
index ede03d57abe124..00000000000000
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.modules.debug;
-
-import com.facebook.fbreact.specs.NativeDevSettingsSpec;
-import com.facebook.react.bridge.Arguments;
-import com.facebook.react.bridge.ReactApplicationContext;
-import com.facebook.react.bridge.UiThreadUtil;
-import com.facebook.react.bridge.WritableMap;
-import com.facebook.react.devsupport.interfaces.DevOptionHandler;
-import com.facebook.react.devsupport.interfaces.DevSupportManager;
-import com.facebook.react.module.annotations.ReactModule;
-
-/**
- * Module that exposes the URL to the source code map (used for exception stack trace parsing) to JS
- */
-@ReactModule(name = NativeDevSettingsSpec.NAME)
-public class DevSettingsModule extends NativeDevSettingsSpec {
-
-  private final DevSupportManager mDevSupportManager;
-
-  public DevSettingsModule(
-      ReactApplicationContext reactContext, DevSupportManager devSupportManager) {
-    super(reactContext);
-
-    mDevSupportManager = devSupportManager;
-  }
-
-  @Override
-  public void reload() {
-    if (mDevSupportManager.getDevSupportEnabled()) {
-      UiThreadUtil.runOnUiThread(
-          new Runnable() {
-            @Override
-            public void run() {
-              mDevSupportManager.handleReloadJS();
-            }
-          });
-    }
-  }
-
-  @Override
-  public void reloadWithReason(String reason) {
-    this.reload();
-  }
-
-  @Override
-  public void onFastRefresh() {
-    // noop
-  }
-
-  @Override
-  public void setHotLoadingEnabled(boolean isHotLoadingEnabled) {
-    mDevSupportManager.setHotModuleReplacementEnabled(isHotLoadingEnabled);
-  }
-
-  @Override
-  public void setIsDebuggingRemotely(boolean isDebugginRemotelyEnabled) {
-    mDevSupportManager.setRemoteJSDebugEnabled(isDebugginRemotelyEnabled);
-  }
-
-  @Override
-  public void setProfilingEnabled(boolean isProfilingEnabled) {
-    mDevSupportManager.setFpsDebugEnabled(isProfilingEnabled);
-  }
-
-  @Override
-  public void toggleElementInspector() {
-    mDevSupportManager.toggleElementInspector();
-  }
-
-  @Override
-  public void addMenuItem(final String title) {
-    mDevSupportManager.addCustomDevOption(
-        title,
-        new DevOptionHandler() {
-          @Override
-          public void onOptionSelected() {
-            WritableMap data = Arguments.createMap();
-            data.putString("title", title);
-
-            ReactApplicationContext reactApplicationContext =
-                getReactApplicationContextIfActiveOrWarn();
-
-            if (reactApplicationContext != null) {
-              reactApplicationContext.emitDeviceEvent("didPressMenuItem", data);
-            }
-          }
-        });
-  }
-
-  @Override
-  public void setIsShakeToShowDevMenuEnabled(boolean enabled) {
-    // iOS only
-  }
-
-  @Override
-  public void addListener(String eventName) {
-    // iOS only
-  }
-
-  @Override
-  public void removeListeners(double count) {
-    // iOS only
-  }
-}
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.kt
new file mode 100644
index 00000000000000..258f8042c5fec1
--- /dev/null
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.kt
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.modules.debug
+
+import com.facebook.fbreact.specs.NativeDevSettingsSpec
+import com.facebook.react.bridge.Arguments
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.UiThreadUtil
+import com.facebook.react.devsupport.interfaces.DevSupportManager
+import com.facebook.react.module.annotations.ReactModule
+
+/**
+ * Module that exposes the URL to the source code map (used for exception stack trace parsing) to JS
+ */
+@ReactModule(name = NativeDevSettingsSpec.NAME)
+public class DevSettingsModule(
+    reactContext: ReactApplicationContext?,
+    private val devSupportManager: DevSupportManager
+) : NativeDevSettingsSpec(reactContext) {
+  override fun reload() {
+    if (devSupportManager.devSupportEnabled) {
+      UiThreadUtil.runOnUiThread { devSupportManager.handleReloadJS() }
+    }
+  }
+
+  override fun reloadWithReason(reason: String) {
+    reload()
+  }
+
+  override fun onFastRefresh() {
+    // noop
+  }
+
+  override fun setHotLoadingEnabled(isHotLoadingEnabled: Boolean) {
+    devSupportManager.setHotModuleReplacementEnabled(isHotLoadingEnabled)
+  }
+
+  override fun setIsDebuggingRemotely(isDebugginRemotelyEnabled: Boolean) {
+    devSupportManager.setRemoteJSDebugEnabled(isDebugginRemotelyEnabled)
+  }
+
+  override fun setProfilingEnabled(isProfilingEnabled: Boolean) {
+    devSupportManager.setFpsDebugEnabled(isProfilingEnabled)
+  }
+
+  override fun toggleElementInspector() {
+    devSupportManager.toggleElementInspector()
+  }
+
+  override fun addMenuItem(title: String) {
+    devSupportManager.addCustomDevOption(title) {
+      val data = Arguments.createMap()
+      data.putString("title", title)
+      val reactApplicationContext = reactApplicationContextIfActiveOrWarn
+      reactApplicationContext?.emitDeviceEvent("didPressMenuItem", data)
+    }
+  }
+
+  override fun setIsShakeToShowDevMenuEnabled(enabled: Boolean) {
+    // iOS only
+  }
+
+  override fun addListener(eventName: String) {
+    // iOS only
+  }
+
+  override fun removeListeners(count: Double) {
+    // iOS only
+  }
+}