--- /dev/null
+<?php
+
+namespace Drupal\metatag_twitter_cards\Plugin\metatag\Tag;
+
+use Drupal\metatag\Plugin\metatag\Tag\MetaNameBase;
+
+/**
+ * The Twitter Cards app id for iphone metatag.
+ *
+ * @MetatagTag(
+ * id = "twitter_cards_app_id_iphone",
+ * label = @Translation("iPhone app ID"),
+ * description = @Translation("String value, should be the numeric representation of your iPhone app's ID in the App Store."),
+ * name = "twitter:app:id:iphone",
+ * group = "twitter_cards",
+ * weight = 302,
+ * type = "string",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class TwitterCardsAppIdIphone extends MetaNameBase {
+}