diff --git a/homeassistant/components/vizio/media_player.py b/homeassistant/components/vizio/media_player.py
index e9cd89c635a..664a8ae7da8 100644
--- a/homeassistant/components/vizio/media_player.py
+++ b/homeassistant/components/vizio/media_player.py
@@ -145,7 +145,7 @@ class VizioDevice(MediaPlayerEntity):
         self._volume_step = config_entry.options[CONF_VOLUME_STEP]
         self._current_input = None
         self._current_app_config = None
-        self._app_name = None
+        self._attr_app_name = None
         self._available_inputs = []
         self._available_apps = []
         self._all_apps = apps_coordinator.data if apps_coordinator else None
@@ -209,7 +209,7 @@ class VizioDevice(MediaPlayerEntity):
             self._attr_volume_level = None
             self._attr_is_volume_muted = None
             self._current_input = None
-            self._app_name = None
+            self._attr_app_name = None
             self._current_app_config = None
             self._attr_sound_mode = None
             return
@@ -265,13 +265,13 @@ class VizioDevice(MediaPlayerEntity):
             log_api_exception=False
         )
 
-        self._app_name = find_app_name(
+        self._attr_app_name = find_app_name(
             self._current_app_config,
             [APP_HOME, *self._all_apps, *self._additional_app_configs],
         )
 
-        if self._app_name == NO_APP_RUNNING:
-            self._app_name = None
+        if self._attr_app_name == NO_APP_RUNNING:
+            self._attr_app_name = None
 
     def _get_additional_app_names(self) -> list[dict[str, Any]]:
         """Return list of additional apps that were included in configuration.yaml."""
@@ -337,8 +337,8 @@ class VizioDevice(MediaPlayerEntity):
     @property
     def source(self) -> str | None:
         """Return current input of the device."""
-        if self._app_name is not None and self._current_input in INPUT_APPS:
-            return self._app_name
+        if self._attr_app_name is not None and self._current_input in INPUT_APPS:
+            return self._attr_app_name
 
         return self._current_input
 
@@ -364,14 +364,6 @@ class VizioDevice(MediaPlayerEntity):
 
         return self._available_inputs
 
-    @property
-    def app_name(self) -> str | None:
-        """Return the name of the current app."""
-        if self.source == self._app_name:
-            return self._app_name
-
-        return None
-
     @property
     def app_id(self) -> str | None:
         """Return the ID of the current app if it is unknown by pyvizio."""
diff --git a/tests/components/vizio/test_media_player.py b/tests/components/vizio/test_media_player.py
index d3ef4019c57..80f72280951 100644
--- a/tests/components/vizio/test_media_player.py
+++ b/tests/components/vizio/test_media_player.py
@@ -764,6 +764,5 @@ async def test_vizio_update_with_apps_on_input(
     )
     await _add_config_entry_to_hass(hass, config_entry)
     attr = _get_attr_and_assert_base_attr(hass, DEVICE_CLASS_TV, STATE_ON)
-    # App name and app ID should not be in the attributes
-    assert "app_name" not in attr
+    # app ID should not be in the attributes
     assert "app_id" not in attr