diff --git a/client/internal/CMakeLists.txt b/client/internal/CMakeLists.txt
index 93fbed89936e6598f9d7acb32e8664996cf4ba5f..f76cc95852d6c9979711c7956fd08f908d82c92a 100644
--- a/client/internal/CMakeLists.txt
+++ b/client/internal/CMakeLists.txt
@@ -1,8 +1,12 @@
 add_subdirectory(entities)
 add_subdirectory(httpClient)
+add_subdirectory(gui)
 
 set(libClientEntities_LIB ${libClientEntities_LIB} PARENT_SCOPE)
 set(libClientEntities_INCLUDE_DIRS ${libClientEntities_INCLUDE_DIRS} PARENT_SCOPE)
 
 set(HTTPCLIENT_lib_LIB ${HTTPCLIENT_lib_LIB} PARENT_SCOPE)
-set(HTTPCLIENT_lib_INCLUDE_DIRS ${HTTPCLIENT_lib_INCLUDE_DIRS} PARENT_SCOPE)
\ No newline at end of file
+set(HTTPCLIENT_lib_INCLUDE_DIRS ${HTTPCLIENT_lib_INCLUDE_DIRS} PARENT_SCOPE)
+
+set(GUI_lib_LIB ${GUI_lib_LIB} PARENT_SCOPE)
+set(GUI_lib_INCLUDE_DIRS ${GUI_lib_INCLUDE_DIRS} PARENT_SCOPE)
\ No newline at end of file
diff --git a/client/internal/gui/CMakeLists.txt b/client/internal/gui/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..60da13c95b5f5cb01d81d42bb8c14acef1895c52
--- /dev/null
+++ b/client/internal/gui/CMakeLists.txt
@@ -0,0 +1,24 @@
+project("GuiLib")
+
+set(CMAKE_CXX_STANDARD 20)
+
+file(GLOB SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp)
+file(GLOB INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/include)
+file(GLOB INCLUDES ${CMAKE_CURRENT_SOURCE_DIR}/include/*.h)
+
+set(CMAKE_PREFIX_PATH "~/Qt/6.5.0/macos/lib/cmake")
+find_package(Qt6 REQUIRED COMPONENTS Widgets Core Gui)
+
+include_directories(${INCLUDE_DIRS} ${libClientEntities_INCLUDE_DIRS})
+
+add_library(${PROJECT_NAME} ${SOURCES} ${INCLUDES})
+target_link_libraries(${PROJECT_NAME} ${libClientEntities_LIB} Qt6::Widgets Qt6::Core Qt6::Gui)
+
+set(GUI_lib_LIB ${PROJECT_NAME})
+set(GUI_lib_LIB ${GUI_lib_LIB} PARENT_SCOPE)
+
+set(GUI_lib_INCLUDE_DIRS ${INCLUDE_DIRS})
+set(GUI_lib_INCLUDE_DIRS ${GUI_lib_INCLUDE_DIRS} PARENT_SCOPE)
+
+enable_testing()
+add_subdirectory(tests)
\ No newline at end of file
diff --git a/client/internal/gui/include/AuthDialog.h b/client/internal/gui/include/AuthDialog.h
new file mode 100644
index 0000000000000000000000000000000000000000..76b3f9b12482ef8d8489c5d9d278660978c8c5b4
--- /dev/null
+++ b/client/internal/gui/include/AuthDialog.h
@@ -0,0 +1,43 @@
+#ifndef AUTH_DIALOG_H
+#define AUTH_DIALOG_H
+
+#include <QDialog>
+#include <QLabel>
+#include <QGroupBox>
+#include <QVBoxLayout>
+#include <QLineEdit>
+
+class AuthDialog : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit AuthDialog(QWidget *parent = nullptr);
+    ~AuthDialog() override;
+
+signals:
+    void showMainWindow();
+    void showUserWindow();
+
+private slots:
+    void on_loginButton_clicked();
+    void on_backButton_clicked();
+
+private:
+    QGroupBox *groupBox = nullptr;
+    QWidget *layoutWidget = nullptr;
+    QVBoxLayout *verticalLayout = nullptr;
+    QHBoxLayout *horizontalLayout = nullptr;
+    QLabel *loginLabel = nullptr;
+    QLineEdit *login = nullptr;
+    QHBoxLayout *horizontalLayout_2 = nullptr;
+    QLabel *passwordLabel = nullptr;
+    QLineEdit *password = nullptr;
+    QPushButton *loginButton = nullptr;
+    QPushButton *backButton = nullptr;
+
+    void setupUi(QDialog *AuthDialog);
+
+    void setTexts(QDialog *AuthDialog);
+};
+
+#endif  // AUTH_DIALOG_H
diff --git a/client/internal/gui/include/EntryWindow.h b/client/internal/gui/include/EntryWindow.h
new file mode 100644
index 0000000000000000000000000000000000000000..b7acbd03f377480ea5a6e8ee6c1780e4fc87ce1a
--- /dev/null
+++ b/client/internal/gui/include/EntryWindow.h
@@ -0,0 +1,45 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QPushButton>
+
+#include "AuthDialog.h"
+#include "SignUpDialog.h"
+
+class EntryWindow : public QMainWindow {
+Q_OBJECT
+
+public:
+    EntryWindow(QWidget *parent = nullptr);
+    ~EntryWindow() override;
+
+    std::shared_ptr<SignUpDialog> getSignUpDialog();
+    std::shared_ptr<AuthDialog> getAuthDialog();
+
+private slots:
+    static void onExitButtonClicked();
+    void onLoginButtonClicked();
+    void onSignUpButtonClicked();
+
+private:
+    std::shared_ptr<AuthDialog> authDialog = nullptr;
+    std::shared_ptr<SignUpDialog> signUpDialog = nullptr;
+    QWidget *centralwidget = nullptr;
+    QVBoxLayout *verticalLayout = nullptr;
+    QLabel *introLabel = nullptr;
+    QPushButton *loginButton = nullptr;
+    QSpacerItem *horizontalSpacer = nullptr;
+    QPushButton *signUpButton = nullptr;
+    QSpacerItem *horizontalSpacer_2 = nullptr;
+    QPushButton *exitButton = nullptr;
+    QMenuBar *menubar = nullptr;
+    QStatusBar *statusbar = nullptr;
+
+    void setupUi(QMainWindow *MainWindow);
+    void retranslateUi(QMainWindow *MainWindow);
+};
+
+#endif  // MAINWINDOW_H
diff --git a/client/internal/gui/include/SignUpDialog.h b/client/internal/gui/include/SignUpDialog.h
new file mode 100644
index 0000000000000000000000000000000000000000..2882b2435c625dd4f9a1647bc3a286c838417958
--- /dev/null
+++ b/client/internal/gui/include/SignUpDialog.h
@@ -0,0 +1,46 @@
+#ifndef SIGN_UP_DIALOG_H
+#define SIGN_UP_DIALOG_H
+
+#include <QDialog>
+#include <QGroupBox>
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QLineEdit>
+
+class SignUpDialog : public QDialog {
+Q_OBJECT
+
+public:
+    explicit SignUpDialog(QWidget *parent = nullptr);
+    ~SignUpDialog() override;
+
+signals:
+    void showEntryWindow();
+    void showUserWindow();
+
+private slots:
+    void on_signUpButton_clicked() {};
+    void on_backButton_clicked() {};
+
+private:
+    QGroupBox *groupBox = nullptr;
+    QWidget *layoutWidget = nullptr;
+    QVBoxLayout *verticalLayout_2 = nullptr;
+    QVBoxLayout *verticalLayout = nullptr;
+    QGridLayout *gridLayout = nullptr;
+    QLabel *enterLoginLabel = nullptr;
+    QLineEdit *login = nullptr;
+    QGridLayout *gridLayout_2 = nullptr;
+    QLineEdit *pass = nullptr;
+    QLabel *enterPasswordLabel = nullptr;
+    QHBoxLayout *horizontalLayout_3 = nullptr;
+    QLabel *repeatPasswordLabel = nullptr;
+    QLineEdit *passRepeat = nullptr;
+    QPushButton *signUpButton = nullptr;
+    QPushButton *backButton = nullptr;
+
+    void setupUi(QDialog *SignUpDialog);
+    void retranslateUi(QDialog *SignUpDialog);
+};
+
+#endif // SIGN_UP_DIALOG_H
diff --git a/client/internal/gui/include/StatsDialog.h b/client/internal/gui/include/StatsDialog.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a1003884348fd502f5e68115ba6529bb5080c61
--- /dev/null
+++ b/client/internal/gui/include/StatsDialog.h
@@ -0,0 +1,25 @@
+//
+// Created by Николай Степанов on 04.05.2023.
+//
+
+#ifndef SOURCEDOUT_STATSDIALOG_H
+#define SOURCEDOUT_STATSDIALOG_H
+
+#include <QTableView>
+#include <QTableWidget>
+#include "Metric.h"
+
+class StatsDialog : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit StatsDialog(QWidget *parent = nullptr) {};
+    ~StatsDialog() override {};
+
+private:
+    QTableView* tableView = nullptr;
+    QTableWidget* tableWidget = nullptr;
+    QVector<Metric> metrics;
+};
+
+#endif //SOURCEDOUT_STATSDIALOG_H
diff --git a/client/internal/gui/include/UIManager.h b/client/internal/gui/include/UIManager.h
new file mode 100644
index 0000000000000000000000000000000000000000..3d030f2c6991f4f4753b77fc1c75e85950cace47
--- /dev/null
+++ b/client/internal/gui/include/UIManager.h
@@ -0,0 +1,21 @@
+#ifndef INCLUDE_UIMANAGER_H_
+#define INCLUDE_UIMANAGER_H_
+
+#include "EntryWindow.h"
+#include "UserWindow.h"
+
+class UIManager {
+public:
+    UIManager();
+
+    ~UIManager() = default;
+
+    void showEntryWindow();
+    void showUserWindow();
+
+private:
+    EntryWindow entryWindow;
+    UserWindow userWindow;
+};
+
+#endif  // INCLUDE_UIMANAGER_H_
diff --git a/client/internal/gui/include/UserWindow.h b/client/internal/gui/include/UserWindow.h
new file mode 100644
index 0000000000000000000000000000000000000000..859d69e24061c377ecca787fa9ea60aba3140e65
--- /dev/null
+++ b/client/internal/gui/include/UserWindow.h
@@ -0,0 +1,46 @@
+#ifndef USERWINDOW_H
+#define USERWINDOW_H
+
+#include <QMainWindow>
+#include <QGroupBox>
+#include <QVBoxLayout>
+#include <QPushButton>
+#include <QSlider>
+#include <QScrollArea>
+#include <QComboBox>
+#include <QLabel>
+#include <QFileDialog>
+#include "StatsDialog.h"
+
+class UserWindow : public QMainWindow {
+Q_OBJECT
+
+public:
+    explicit UserWindow(QWidget *parent = nullptr);
+    ~UserWindow() override = default;
+
+signals:
+    void logout();
+
+private slots:
+    void onBackButtonClicked();
+    void onListElementClicked();
+    void onSendButtonClicked();
+
+private:
+
+    QTabWidget* tabs = nullptr;
+    StatsDialog* statsDialog = nullptr;
+    QPushButton *backButton = nullptr;
+    QPushButton *sendButton = nullptr;
+    QComboBox* comboBox = nullptr;
+    QVBoxLayout* verticalLayout = nullptr;
+    QLabel* label = nullptr;
+    QLabel* description = nullptr;
+    QFileDialog* fileDialog = nullptr;
+    QStringList* list = nullptr;
+
+    QWidget *centralwidget = nullptr;
+};
+
+#endif  // USERWINDOW_H
diff --git a/client/internal/gui/src/AuthDialog.cpp b/client/internal/gui/src/AuthDialog.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0e57d4d04b2200acd868813075f4627e4351d8d4
--- /dev/null
+++ b/client/internal/gui/src/AuthDialog.cpp
@@ -0,0 +1,15 @@
+#include "AuthDialog.h"
+
+AuthDialog::AuthDialog(QWidget *parent) : QDialog(parent) {
+    setupUi(this);
+}
+
+AuthDialog::~AuthDialog() {}
+
+void AuthDialog::on_loginButton_clicked() {}
+
+void AuthDialog::setupUi(QDialog *AuthDialog) {}
+
+void AuthDialog::setTexts(QDialog *AuthDialog) {}
+
+void AuthDialog::on_backButton_clicked() {}
diff --git a/client/internal/gui/src/EntryWindow.cpp b/client/internal/gui/src/EntryWindow.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8bf9bc37491f5018246c71cad4cacdaee138ead3
--- /dev/null
+++ b/client/internal/gui/src/EntryWindow.cpp
@@ -0,0 +1,27 @@
+#include "EntryWindow.h"
+
+#include <QMenuBar>
+#include <QStatusBar>
+#include <QApplication>
+#include <QCoreApplication>
+#include "AuthDialog.h"
+#include "SignUpDialog.h"
+
+EntryWindow::EntryWindow(QWidget *parent) : QMainWindow(parent) {}
+
+EntryWindow::~EntryWindow() {}
+
+void EntryWindow::setupUi(QMainWindow *MainWindow) {}
+
+void EntryWindow::retranslateUi(QMainWindow *MainWindow) {}
+
+void EntryWindow::onExitButtonClicked() {}
+
+void EntryWindow::onLoginButtonClicked() {}
+
+
+void EntryWindow::onSignUpButtonClicked() {}
+
+std::shared_ptr<SignUpDialog> EntryWindow::getSignUpDialog() {}
+
+std::shared_ptr<AuthDialog> EntryWindow::getAuthDialog() {}
diff --git a/client/internal/gui/src/SignUpDialog.cpp b/client/internal/gui/src/SignUpDialog.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8750c806df0b9aa120aecf219461200db6f5530a
--- /dev/null
+++ b/client/internal/gui/src/SignUpDialog.cpp
@@ -0,0 +1,17 @@
+#include "SignUpDialog.h"
+
+#include <QCoreApplication>
+#include <QPushButton>
+#include <QMessageBox>
+
+//#include "Core.h"
+
+SignUpDialog::SignUpDialog(QWidget *parent) : QDialog(parent) {}
+
+SignUpDialog::~SignUpDialog() {}
+
+void SignUpDialog::retranslateUi(QDialog *SignUpDialog) {}
+
+void SignUpDialog::setupUi(QDialog *SignUpDialog) {}
+
+// setupUi
diff --git a/client/internal/gui/src/UIManager.cpp b/client/internal/gui/src/UIManager.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..fc2330143ca373ec1910642700adef2f3b14167e
--- /dev/null
+++ b/client/internal/gui/src/UIManager.cpp
@@ -0,0 +1,11 @@
+#include "UIManager.h"
+
+#include "EntryWindow.h"
+#include "UserWindow.h"
+#include "SignUpDialog.h"
+
+void UIManager::showEntryWindow() {}
+
+void UIManager::showUserWindow() {}
+
+UIManager::UIManager() = default;
diff --git a/client/internal/gui/src/UserWindow.cpp b/client/internal/gui/src/UserWindow.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8e6169bd3260d65e4b001e5bf9b8368dcf3d01e2
--- /dev/null
+++ b/client/internal/gui/src/UserWindow.cpp
@@ -0,0 +1,9 @@
+#include "UserWindow.h"
+
+#include <QMenuBar>
+#include <QStatusBar>
+#include <QApplication>
+
+UserWindow::UserWindow(QWidget *parent) : QMainWindow(parent) {}
+
+void UserWindow::onBackButtonClicked() {}
diff --git a/client/internal/gui/tests/CMakeLists.txt b/client/internal/gui/tests/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5877dc8f3540e9e3e1ab3fba04817c5a58af3ecb
--- /dev/null
+++ b/client/internal/gui/tests/CMakeLists.txt
@@ -0,0 +1,16 @@
+project(test_gui)
+
+set(CMAKE_CXX_STANDARD 20)
+add_compile_options(-coverage)
+
+file(GLOB SOURCES *.cpp)
+
+enable_testing()
+find_package(GTest REQUIRED)
+
+add_executable(${PROJECT_NAME} ${SOURCES})
+
+target_link_libraries(${PROJECT_NAME} ${GUI_lib_LIB} GTest::GTest GTest::gmock)
+target_include_directories(${PROJECT_NAME} PUBLIC ${GUI_lib_INCLUDE_DIRS})
+
+add_test(test_gui test_gui)
\ No newline at end of file
diff --git a/client/internal/gui/tests/main.cpp b/client/internal/gui/tests/main.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..d9f4b73ba0af8a968672a3ae17deee33d70f8b2e
--- /dev/null
+++ b/client/internal/gui/tests/main.cpp
@@ -0,0 +1,52 @@
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "UIManager.h"
+#include "EntryWindow.h"
+#include "UserWindow.h"
+
+#include <QApplication>
+
+TEST(ConstructorTest, EntryWindow) {
+    int fake = 0;
+    QApplication a(fake, nullptr);
+    EntryWindow mw;
+    EXPECT_NO_FATAL_FAILURE(mw.show());
+    a.exec();
+}
+
+TEST(ConstructorTest, UserWindow) {
+    int fake = 0;
+    QApplication a(fake, nullptr);
+    UserWindow uw;
+    EXPECT_NO_FATAL_FAILURE(uw.show());
+    a.exec();
+}
+
+TEST(ConstructorTest, UIManagerMW) {
+    int fake_argc = 0;
+    QApplication a(fake_argc, nullptr);
+    UIManager um;
+    EXPECT_NO_FATAL_FAILURE(um.showEntryWindow());
+    a.exec();
+}
+
+TEST(ConstructorTest, UIManagerUW) {
+    int fake_argc = 0;
+    QApplication a(fake_argc, nullptr);
+    UIManager um;
+    EXPECT_NO_FATAL_FAILURE(um.showUserWindow());
+    a.exec();
+}
+
+TEST(ConstructorTest, MainWindow_AuthDialog) {
+    int fake_argc = 0;
+    QApplication a(fake_argc, nullptr);
+    EntryWindow mainWindow;
+    EXPECT_NO_FATAL_FAILURE(mainWindow.getAuthDialog()->show());
+}
+
+int main(int argc, char *argv[]) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}