diff --git a/system/apparatus.cpp b/system/apparatus.cpp
index 35ef8e2..a75dbfb 100644
--- a/system/apparatus.cpp
+++ b/system/apparatus.cpp
@@ -2,16 +2,17 @@
 
 
 apparatus *apparatus::_instance = nullptr;
+const QString apparatus::filename = "data.bin";
 
 void apparatus::open_reading_stream() {
-    this->_bin_file = new QFile("data.bin");
+    this->_bin_file = new QFile(apparatus::filename);
     this->_bin_file->open(QIODevice::ReadOnly);
 
     stream.setDevice(_bin_file);
 }
 
 void apparatus::open_writing_stream() {
-    this->_bin_file = new QFile("data.bin");
+    this->_bin_file = new QFile(apparatus::filename);
     this->_bin_file->open(QIODevice::WriteOnly);
 
     stream.setDevice(_bin_file);
@@ -49,6 +50,10 @@ apparatus& apparatus::instance() {
     return *apparatus::_instance;
 }
 
+bool apparatus::isFirstRun() {
+    return QFile(apparatus::filename).exists();
+}
+
 void apparatus::init() {
     apparatus::_instance = new apparatus();
 }
diff --git a/system/apparatus.h b/system/apparatus.h
index af8a22c..6fcbe75 100644
--- a/system/apparatus.h
+++ b/system/apparatus.h
@@ -1,6 +1,7 @@
 #ifndef APPARATUS_H
 #define APPARATUS_H
 
+#include <QString>
 #include <QFile>
 #include <QDataStream>
 
@@ -12,6 +13,7 @@ class apparatus
 {
 private:
     static apparatus *_instance;
+    static const QString filename;
 
     QFile *_bin_file;
     QDataStream stream;
@@ -30,6 +32,8 @@ public:
     apparatus();
     ~apparatus();
 
+    bool isFirstRun();
+
     static apparatus& instance();
     static void init();
     static void shutdown();