diff --git a/f8/app.cc b/f8/app.cc
new file mode 100644
index 0000000..411cbc3
--- /dev/null
+++ b/f8/app.cc
@@ -0,0 +1,6 @@
+#include <a8/a8.h>
+#include <a8/uuid.h>
+
+#include <f8/f8.h>
+
+#include <f8/app.h>
diff --git a/f8/app.h b/f8/app.h
new file mode 100644
index 0000000..526abd6
--- /dev/null
+++ b/f8/app.h
@@ -0,0 +1,58 @@
+#pragma once
+
+#include <a8/singleton.h>
+
+namespace a8
+{
+    namespace uuid
+    {
+        class SnowFlake;
+    }
+}
+
+namespace f8
+{
+
+    class UserApp
+    {
+    public:
+        virtual const std::string GetPkgName() = 0;
+        virtual void Init() = 0;
+        virtual void UnInit() = 0;
+        virtual void Update() = 0;
+    };
+
+    class App : public a8::Singleton<App>
+    {
+    private:
+        App() {};
+        friend class a8::Singleton<App>;
+
+        void Run(UserApp* user_app);
+
+        const std::string GetPkgName();
+        void NotifyLoopCond();
+        bool HasFlag(int flag);
+        long long NewUuid();
+        int GetZoneId() { return zone_id_; }
+        int GetNodeId() { return node_id_; }
+        int GetInstanceId() { return instance_id_; }
+
+    private:
+        UserApp* user_app_ = nullptr;
+        int argc_ = 0;
+        char** argv_ = nullptr;
+        volatile bool terminated_ = false;
+        volatile bool shutdowned_ = false;
+
+        int zone_id_ = 0;
+        int node_id_ = 0;
+        int instance_id_ = 0;
+        std::set<int> flags_;
+
+        std::shared_ptr<a8::uuid::SnowFlake> uuid_;
+        std::mutex *loop_mutex_ = nullptr;
+        std::condition_variable *loop_cond_ = nullptr;
+    };
+
+}