diff --git a/example/framework/app_internal_api_test.cpp b/example/framework/app_internal_api_test.cpp
index a182767..4d1a0e1 100644
--- a/example/framework/app_internal_api_test.cpp
+++ b/example/framework/app_internal_api_test.cpp
@@ -10,6 +10,7 @@
  */
 #include <iostream>
 #include <mooncake.h>
+#include <string>
 
 using namespace MOONCAKE;
 
@@ -22,6 +23,7 @@ class App_1111 : public APP_BASE
     {
         /* Frame work define wrap */
         std::cout << mcAppGetFramework()->getInstalledAppList()[0]->getAppName() << "\n";
+        std::cout << (const char*)mcAppGetFramework()->getUserData() << "\n";
     }
 };
 /* Create a new app packer with new resource and memory manager */
@@ -41,6 +43,9 @@ int main()
     Mooncake mooncake;
     mooncake.init();
 
+    std::string hi = "hi im fine, thank you";
+    mooncake.setUserData((void*)hi.c_str());
+
     mooncake.installApp(new App_1111_packer);
     mooncake.createApp(mooncake.getInstalledAppList()[0]);
 
diff --git a/src/mooncake.h b/src/mooncake.h
index 176f48c..dece41f 100644
--- a/src/mooncake.h
+++ b/src/mooncake.h
@@ -35,6 +35,7 @@ namespace MOONCAKE
         {
             APP_Register* app_register = nullptr;
             APP_Manager* app_manager = nullptr;
+            void* user_data = nullptr;
         };
         Data_t _data;
         void _free_components();
@@ -48,6 +49,12 @@ namespace MOONCAKE
         inline APP_Register* getAppRegister() { return _data.app_register; }
         inline APP_Manager* getAppManager() { return _data.app_manager; }
 
+        /* -------------------------------- User data ------------------------------- */
+        // Can be your database or anything
+    public:
+        inline void setUserData(void* userData) { _data.user_data = userData; }
+        inline void* getUserData() { return _data.user_data; }
+
         /* ----------------------------- Framework apis ----------------------------- */
     public:
         /**