diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96919f2b82..e73fd9947c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ HumHub Changelog
 - Enh #7333: Improved Yii alias handling and added ENV support
 - Enh #7334: New safe method to rename a database column
 - Enh #7336: Update GitHub workflow versions
+- Enh #7339: Add `DeviceDetectorHelper::isMultiInstanceApp()` method to detect if the app is running in a multi-instance mode
 
 1.17.0-beta.2 (November 12, 2024)
 ---------------------------------
diff --git a/protected/humhub/helpers/DeviceDetectorHelper.php b/protected/humhub/helpers/DeviceDetectorHelper.php
index 48828e8020..abfa0a7744 100644
--- a/protected/humhub/helpers/DeviceDetectorHelper.php
+++ b/protected/humhub/helpers/DeviceDetectorHelper.php
@@ -52,6 +52,13 @@ class DeviceDetectorHelper
             && Yii::$app->request->headers->get('x-humhub-app-is-android');
     }
 
+    public static function isMultiInstanceApp(): bool
+    {
+        return
+            static::isAppRequest()
+            && Yii::$app->request->headers->get('x-humhub-app-is-multi-instance');
+    }
+
     public static function isMicrosoftOffice(): bool
     {
         return str_contains((string)Yii::$app->request->getUserAgent(), 'Microsoft Office');