diff --git a/lv_app/lv_app.c b/lv_app/lv_app.c
new file mode 100644
index 000000000..443218ece
--- /dev/null
+++ b/lv_app/lv_app.c
@@ -0,0 +1,186 @@
+/**
+ * @file lv_app.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_app.h"
+#include "lvgl/lv_objx/lv_btn.h"
+#include "lvgl/lv_objx/lv_win.h"
+#include "img_conf.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static bool lv_app_sc_rel_action(lv_obj_t * sc, lv_dispi_t * dispi);
+static bool lv_app_win_close_action(lv_obj_t * close_btn, lv_dispi_t * dispi);
+
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static ll_dsc_t app_dsc_ll; /*Store a pointer to the app descriptors*/
+static ll_dsc_t app_inst_ll; /*Store the running apps*/
+LV_IMG_DECLARE(img_close);
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+/**
+ * Initialize the application system
+ */
+void lv_app_init(void)
+{
+	ll_init(&app_dsc_ll, sizeof(lv_app_dsc_t *));
+	ll_init(&app_inst_ll, sizeof(lv_app_inst_t));
+
+	/*Create images for the window control buttons*/
+	lv_img_create_file("close",img_close);
+
+	/*Initialize all application descriptors*/
+	const lv_app_dsc_t ** dsc;
+#if USE_LV_APP_EXAMPLE
+	dsc = ll_ins_head(&app_dsc_ll);
+	*dsc = lv_app_example_init();
+#endif
+}
+
+/**
+ * Run an application according to 'app_dsc'
+ * @param app_dsc pointer to an application descriptor
+ * @param cstr a Create STRing which can give initial parameters to the application (NULL or "" if unused)
+ * @return pointer to the opened application or NULL if any error occurred
+ */
+lv_app_inst_t * lv_app_run(const lv_app_dsc_t * app_dsc, const char * cstr)
+{
+	/*Add a new application and initialize it*/
+	lv_app_inst_t * app;
+	app = ll_ins_head(&app_inst_ll);
+	app->dsc = app_dsc;
+	app->app_data = dm_alloc(app_dsc->app_data_size);
+
+	/*Call the application specific run function*/
+	app_dsc->app_run(app, cstr);
+
+	return app;
+}
+
+/**
+ * Close a running application. Close the Window and the Shortcut too if opened.
+ * @param app pointer to an application
+ */
+void lv_app_close(lv_app_inst_t * app)
+{
+
+}
+
+/**
+ * Publish an event.
+ * @param app pointer to an application which publishes the event
+ * @param event an event from 'lv_app_event_t' enum
+ */
+void lv_app_event_send(lv_app_inst_t * app, lv_app_event_t event)
+{
+
+}
+
+/**
+ * Open a shortcut for an application
+ * @param app pointer to an application
+ * @return pointer to the shortcut
+ */
+lv_obj_t * lv_app_sc_open(lv_app_inst_t * app)
+{
+	app->sc = lv_btn_create(lv_scr_act(), NULL);
+	lv_obj_set_free_p(app->sc, app);
+	lv_btn_set_rel_action(app->sc, lv_app_sc_rel_action);
+
+	app->sc_data = dm_alloc(app->dsc->sc_data_size);
+	app->dsc->sc_open(app, app->sc);
+
+	return app->sc;
+}
+
+/**
+ * Close the shortcut of an application
+ * @param app pointer to an application
+ */
+void lv_app_sc_close(lv_app_inst_t * app)
+{
+
+}
+
+/**
+ * Open the application in a window
+ * @param app pointer to an application
+ * @return pointer to the shortcut
+ */
+lv_obj_t * lv_app_win_open(lv_app_inst_t * app)
+{
+	app->win = lv_win_create(lv_scr_act(), NULL);
+	lv_obj_set_free_p(app->win, app);
+	lv_win_add_ctrl_btn(app->win, "U:/close", lv_app_win_close_action);
+
+	app->dsc->win_open(app, app->win);
+
+	return app->win;
+}
+
+/**
+ * Close the window of an application
+ * @param app pointer to an application
+ */
+void lv_app_win_close(lv_app_inst_t * app)
+{
+	lv_obj_del(app->win);
+}
+
+
+const lv_app_dsc_t * lv_app_dsc_get(const char * name)
+{
+	const lv_app_dsc_t ** dsc;
+	LL_READ(app_dsc_ll, dsc) {
+		if(strcmp((*dsc)->name, name) == 0) {
+			return *dsc;
+		}
+	}
+
+	return NULL;
+
+
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+static bool lv_app_sc_rel_action(lv_obj_t * sc, lv_dispi_t * dispi)
+{
+	lv_app_inst_t * app = lv_obj_get_free_p(sc);
+	lv_app_win_open(app);
+	return true;
+}
+
+static bool lv_app_win_close_action(lv_obj_t * close_btn, lv_dispi_t * dispi)
+{
+	lv_obj_t * win = lv_win_get_from_ctrl_btn(close_btn);
+	lv_app_inst_t * app = lv_obj_get_free_p(win);
+	lv_app_win_close(app);
+	return false;
+}
+
+
diff --git a/lv_app/lv_app.h b/lv_app/lv_app.h
new file mode 100644
index 000000000..47c30eedf
--- /dev/null
+++ b/lv_app/lv_app.h
@@ -0,0 +1,91 @@
+/**
+ * @file lv_app.h
+ *
+ */
+
+#ifndef LV_APP_H
+#define LV_APP_H
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lvgl/lvgl.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+typedef enum
+{
+	LV_APP_MODE_NONE 	 = 0x0000,
+	LV_APP_MODE_RUN_ONCE = 0x0001,
+	LV_APP_MODE_NO_SC    = 0x0002,		/*No short cut*/
+	LV_APP_MODE_NO_WIN  = 0x0004,		/*No window mode*/
+	LV_APP_MODE_NO_CON   = 0x0008,		/*No connection to other apps*/
+	LV_APP_MODE_NO_CLOSE = 0x0010,		/*No close control button*/
+	LV_APP_MODE_NO_FIX   = 0x0020,		/*No fix control button*/
+}lv_app_mode_t;
+
+typedef enum
+{
+	LV_APP_EVENT_OPEN,
+	LV_APP_EVENT_CLOSE,
+	LV_APP_EVENT_SC_OPENED,
+	LV_APP_EVENT_SC_CLOSED,
+	LV_APP_EVENT_WIN_OPENED,
+	LV_APP_EVENT_WIN_CLOSED,
+}lv_app_event_t;
+
+struct __LV_APP_DSC_T;
+
+typedef struct
+{
+	const struct __LV_APP_DSC_T * dsc;
+	const char * name_mod;
+	lv_obj_t * sc;
+	lv_obj_t * win;
+	void * app_data;
+	void * sc_data;
+	void * win_data;
+}lv_app_inst_t;
+
+typedef struct __LV_APP_DSC_T
+{
+	const char * name;
+	lv_app_mode_t mode;
+	void (*app_run)(lv_app_inst_t *, const char *);
+	void (*app_close) (lv_app_inst_t *);
+	void (*event_read) (lv_app_inst_t *, lv_app_event_t);
+	void (*sc_open) (lv_app_inst_t *, lv_obj_t *);
+	void (*sc_close) (lv_app_inst_t *);
+	void (*win_open) (lv_app_inst_t *, lv_obj_t *);
+	void (*win_close) (lv_app_inst_t *);
+	uint16_t app_data_size;
+	uint16_t sc_data_size;
+	uint16_t win_data_size;
+}lv_app_dsc_t;
+
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_app_init(void);
+lv_app_inst_t * lv_app_run(const lv_app_dsc_t * app_dsc, const char * cstr);
+void lv_app_close(lv_app_inst_t * app);
+void lv_app_event_send(lv_app_inst_t * app, lv_app_event_t event);
+lv_obj_t * lv_app_sc_open(lv_app_inst_t * app);
+void lv_app_sc_close(lv_app_inst_t * app);
+lv_obj_t * lv_app_win_open(lv_app_inst_t * app);
+void lv_app_win_close(lv_app_inst_t * app);
+const lv_app_dsc_t * lv_app_dsc_get(const char * name);
+
+const lv_app_dsc_t * lv_app_example_init(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif
diff --git a/lv_appx/lv_app_example.c b/lv_appx/lv_app_example.c
new file mode 100644
index 000000000..94fae0fb3
--- /dev/null
+++ b/lv_appx/lv_app_example.c
@@ -0,0 +1,167 @@
+/**
+ * @file lv_app_example.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_app_example.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/*Application specific data for an instance of this application*/
+typedef struct
+{
+	const char * txt;
+}app_data_t;
+
+/*Application specific data a window of this application*/
+typedef struct
+{
+
+}win_data_t;
+
+/*Application specific data for a shortcut of this application*/
+typedef struct
+{
+
+}sc_data_t;
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static void my_app_run(lv_app_inst_t * app, const char * cstr);
+static void my_app_close(lv_app_inst_t * app);
+static void my_event_read(lv_app_inst_t * app, lv_app_event_t event);
+static void my_sc_open(lv_app_inst_t * app, lv_obj_t * sc);
+static void my_sc_close(lv_app_inst_t * app);
+static void my_win_open(lv_app_inst_t * app, lv_obj_t * win);
+static void my_win_close(lv_app_inst_t * app);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static lv_app_dsc_t my_app_dsc =
+{
+	.name = "Example",
+	.mode = LV_APP_MODE_NONE,
+	.app_run = my_app_run,
+	.app_close = my_app_close,
+	.event_read = my_event_read,
+	.win_open = my_win_open,
+	.win_close = my_win_close,
+	.sc_open = my_sc_open,
+	.sc_close = my_sc_close,
+	.app_data_size = sizeof(app_data_t),
+	.sc_data_size = sizeof(sc_data_t),
+	.win_data_size = sizeof(win_data_t),
+};
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+const lv_app_dsc_t * lv_app_example_init(void)
+{
+	return &my_app_dsc;
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+/**
+ * Run an application according to 'app_dsc'
+ * @param app_dsc pointer to an application descriptor
+ * @param cstr a Create STRing which can give initial parameters to the application (NULL or "" if unused)
+ * @return pointer to the opened application or NULL if any error occurred
+ */
+static void my_app_run(lv_app_inst_t * app, const char * cstr)
+{
+	/*Check the create string*/
+	if(cstr == NULL || cstr[0] == '\0') {
+		cstr = "No create string";
+	}
+
+	/*Initialize the application*/
+	((app_data_t *)app->app_data)->txt = cstr;	/*Save the create string*/
+}
+
+/**
+ * Close a running application.
+ * Close the Window and the Shortcut too if opened.
+ * Free all the allocated memory by this application.
+ * @param app pointer to an application
+ */
+static void my_app_close(lv_app_inst_t * app)
+{
+
+}
+
+/**
+ * Publish an event.
+ * @param app pointer to an application which publishes the event
+ * @param event an event from 'lv_app_event_t' enum
+ */
+static void my_event_read(lv_app_inst_t * app, lv_app_event_t event)
+{
+
+}
+
+/**
+ * Open a shortcut for an application
+ * @param app pointer to an application
+ * @param sc pointer to an object where the application
+ *           can create content of the shortcut
+ */
+static void my_sc_open(lv_app_inst_t * app, lv_obj_t * sc)
+{
+	lv_obj_t * label;
+	label = lv_label_create(sc, NULL);
+	lv_label_set_text(label, ((app_data_t *)app->app_data)->txt);
+	lv_obj_set_style(label, lv_labels_get(LV_LABELS_BTN, NULL));
+}
+
+/**
+ * Close the shortcut of an application
+ * @param app pointer to an application
+ */
+static void my_sc_close(lv_app_inst_t * app)
+{
+
+}
+
+/**
+ * Open the application in a window
+ * @param app pointer to an application
+ * @param win pointer to a window object where
+ *            the application can create content
+ */
+static void my_win_open(lv_app_inst_t * app, lv_obj_t * win)
+{
+	lv_obj_t * label;
+	label = lv_label_create(win, NULL);
+	lv_label_set_text(label, ((app_data_t *)app->app_data)->txt);
+}
+
+/**
+ * Close the window of an application
+ * @param app pointer to an application
+ */
+static void my_win_close(lv_app_inst_t * app)
+{
+
+}
+
+
diff --git a/lv_appx/lv_app_example.h b/lv_appx/lv_app_example.h
new file mode 100644
index 000000000..5b3ee3e7f
--- /dev/null
+++ b/lv_appx/lv_app_example.h
@@ -0,0 +1,30 @@
+/**
+ * @file lv_app_example.h
+ *
+ */
+
+#ifndef LV_APP_EXAMPLE_H
+#define LV_APP_EXAMPLE_H
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lvgl/lv_app/lv_app.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif /* LV_APP_EXAMPLE */
diff --git a/lv_misc/area.h b/lv_misc/area.h
index 9928f2552..4a104fdf3 100644
--- a/lv_misc/area.h
+++ b/lv_misc/area.h
@@ -3,8 +3,8 @@
  * 
  */
 
-#ifndef _2D_H
-#define _2D_H
+#ifndef AREA_H
+#define AREA_H
 
 /*********************
  *      INCLUDES
diff --git a/lv_obj/lv_obj.h b/lv_obj/lv_obj.h
index d2755b977..8764f8c4b 100644
--- a/lv_obj/lv_obj.h
+++ b/lv_obj/lv_obj.h
@@ -1,5 +1,5 @@
 /**
- * @file lv_base_obj.h
+ * @file lv_obj.h
  * 
  */
 
@@ -250,6 +250,7 @@ lv_signal_f_t  lv_obj_get_signal_f(lv_obj_t * obj);
 void * lv_obj_get_ext(lv_obj_t * obj);
 void * lv_obj_get_style(lv_obj_t * obj);
 uint8_t lv_obj_get_free_num(lv_obj_t * obj);
+void * lv_obj_get_free_p(lv_obj_t * obj);
 
 lv_objs_t * lv_objs_get(lv_objs_builtin_t style, lv_objs_t * copy_p);
 
diff --git a/lvgl.h b/lvgl.h
index faba488ec..3d8ffebac 100644
--- a/lvgl.h
+++ b/lvgl.h
@@ -25,12 +25,14 @@
 #include "lv_objx/lv_ta.h"
 #include "lv_objx/lv_win.h"
 
+#include "lv_app/lv_app.h"
+
 /*********************
  *      DEFINES
  *********************/
 #define LVGL_VERSION_MAJOR 1
-#define LVGL_VERSION_MINOR 3
-#define LVGL_VERSION_BUGFIX 1
+#define LVGL_VERSION_MINOR 4
+#define LVGL_VERSION_BUGFIX 0
 
 /**********************
  *      TYPEDEFS