diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9e79a21..6d8c38c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 project(QRookie
-    VERSION 0.3.5
+    VERSION 0.4.0
     DESCRIPTION "Download and install Quest games from ROOKIE Public Mirror (like VRP Rookie Sideloader but for linux)"
     HOMEPAGE_URL https://github.com/glaumar/QRookie
     LANGUAGES CXX)
diff --git a/content/Tabs/Devices/Device.qml b/content/Tabs/Devices/Device.qml
index face478..f7c5021 100644
--- a/content/Tabs/Devices/Device.qml
+++ b/content/Tabs/Devices/Device.qml
@@ -237,6 +237,8 @@ RowLayout {
                 Kirigami.FormLayout {
                     id: device_info_layout
 
+                    wideMode: true
+
                     Layout.alignment: Qt.AlignBottom
                     Layout.fillWidth: true
                     visible: app.deviceManager.hasConnectedDevice
diff --git a/content/Tabs/Games/Games.qml b/content/Tabs/Games/Games.qml
index 226a0e1..08eb628 100644
--- a/content/Tabs/Games/Games.qml
+++ b/content/Tabs/Games/Games.qml
@@ -139,11 +139,11 @@ ColumnLayout {
         property var headerPadding: header.parent.height
 
         title: qsTr("Settings")
+
+        implicitWidth: 300
         implicitHeight: headerHeight +
                         headerPadding +
-                        auto_install_setting.height +
-                        auto_clean_cache_setting.height
-        implicitWidth: 300
+                        settings_form.height
 
         Kirigami.FormLayout {
             id: settings_form
@@ -179,6 +179,29 @@ ColumnLayout {
                 ToolTip.text: qsTr("Automatically clean the cache when the game is decompressed.")
                 ToolTip.visible: hovered
             }
+
+            ComboBox {
+                id: theme_setting
+
+                width: 200
+                Kirigami.FormData.label: qsTr("Select Theme *:")
+                onActivated: {
+                    app.vrp.settings.theme = currentValue;
+
+                    settings_sheet.close();
+                    restart_dialog.open();
+                }
+                Component.onCompleted: currentIndex = indexOfValue(app.vrp.settings.theme)
+
+                model: app.vrp.compatibleThemes
+            }
+
+            Item {
+                id: restart_label
+
+                height: 30
+                Kirigami.FormData.label: qsTr("* Requires restart")
+            }
         }
 
     }
@@ -243,4 +266,44 @@ ColumnLayout {
         }
 
     }
+
+    Dialog {
+        id: restart_dialog
+
+        title: "Restart Required"
+        modal: true
+        x: (parent.width - width) / 2
+        y: (parent.height - height) / 2
+
+        ColumnLayout {
+            width: parent.width
+
+            Label {
+                text: qsTr("QRookie needs to be restarted in order to apply the new theme.")
+            }
+
+            DialogButtonBox {
+                Layout.alignment: Qt.AlignRight
+                Layout.topMargin: 10
+
+                Button {
+                    text: qsTr("Later")
+                    DialogButtonBox.buttonRole: DialogButtonBox.RejectRole
+                }
+                Button {
+                    text: qsTr("Restart")
+                    DialogButtonBox.buttonRole: DialogButtonBox.AcceptRole
+                }
+                onRejected: {
+                    restart_dialog.close();
+                    settings_sheet.open();
+                }
+                onAccepted: {
+                    restart_dialog.close();
+                    app.vrp.restartMainApp();
+                }
+            }
+        }
+    }
+
 }
diff --git a/flake.nix b/flake.nix
index 7b77973..2923b29 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,7 +22,7 @@
         {
           packages.default = pkgs.stdenv.mkDerivation {
             pname = "qrookie";
-            version = "0.3.5";
+            version = "0.4.0";
 
             src = ./.;
 
diff --git a/io.github.glaumar.QRookie.metainfo.xml b/io.github.glaumar.QRookie.metainfo.xml
index 89d09aa..ae78319 100644
--- a/io.github.glaumar.QRookie.metainfo.xml
+++ b/io.github.glaumar.QRookie.metainfo.xml
@@ -37,6 +37,13 @@
     </provides>
     <content_rating type="oars-1.1" />
     <releases>
+        <release date="2024-08-23" version="0.4.0">
+            <description>
+                <ul>
+                    <li>feat(UI,backend): add theme switcher</li>
+                </ul>
+            </description>
+        </release>
         <release date="2024-08-05" version="0.3.5">
             <description>
                 <ul>
diff --git a/macOs/Info.plist b/macOs/Info.plist
index ab0cef7..1e43c92 100644
--- a/macOs/Info.plist
+++ b/macOs/Info.plist
@@ -7,7 +7,7 @@
     <key>CFBundleIdentifier</key>
     <string>io.github.glaumar.QRookie</string>
     <key>CFBundleVersion</key>
-    <string>v0.3.5</string>
+    <string>v0.4.0</string>
     <key>CFBundleExecutable</key>
     <string>QRookie</string>
     <key>CFBundlePackageType</key>
diff --git a/src/app_settings.cpp b/src/app_settings.cpp
index bbaefdd..c8023b7 100644
--- a/src/app_settings.cpp
+++ b/src/app_settings.cpp
@@ -32,6 +32,7 @@ AppSettings::AppSettings(QObject *parent)
     , data_path_(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation))
     , keystore_path_(QString())
     , last_wireless_addr_(QString())
+    , theme_(QString())
 {
     loadAppSettings();
 }
@@ -68,6 +69,19 @@ void AppSettings::loadAppSettings()
     }
 
     last_wireless_addr_ = settings_->value("last_wireless_addr", last_wireless_addr_).toString();
+
+    theme_ = settings_->value("theme", theme_).toString();
+    if (theme_.isEmpty()) {
+#ifdef Q_OS_LINUX
+        theme_ = "org.kde.breeze";
+#elif defined(Q_OS_MAC)
+        theme_ = "Material";
+#elif defined(Q_OS_WIN)
+        theme_ = "WindowsVista";
+#else
+        theme_ = "Universal";
+#endif
+    }
 }
 
 void AppSettings::setAutoInstall(bool auto_install)
@@ -125,4 +139,11 @@ void AppSettings::setLastWirelessAddr(const QString &addr)
     last_wireless_addr_ = addr;
     settings_->setValue("last_wireless_addr", last_wireless_addr_);
     emit lastWirelessAddrChanged(addr);
-}
\ No newline at end of file
+}
+
+void AppSettings::setTheme(const QString &theme)
+{
+    theme_ = theme;
+    settings_->setValue("theme", theme_);
+    emit themeChanged(theme);
+}
diff --git a/src/app_settings.h b/src/app_settings.h
index 30011e0..4e25877 100644
--- a/src/app_settings.h
+++ b/src/app_settings.h
@@ -31,12 +31,14 @@ class AppSettings : public QObject
     Q_PROPERTY(QString cachePath READ cachePath WRITE setCachePath NOTIFY cachePathChanged)
     Q_PROPERTY(QString dataPath READ dataPath WRITE setDataPath NOTIFY dataPathChanged)
     Q_PROPERTY(QString lastWirelessAddr READ lastWirelessAddr WRITE setLastWirelessAddr NOTIFY lastWirelessAddrChanged)
+    Q_PROPERTY(QString theme READ theme WRITE setTheme NOTIFY themeChanged)
 
 public:
     explicit AppSettings(QObject *parent = nullptr);
     ~AppSettings();
 
     static AppSettings *instance();
+    static int const EXIT_RESTART = 1000;
 
     bool autoInstall() const
     {
@@ -80,6 +82,12 @@ class AppSettings : public QObject
     }
     void setLastWirelessAddr(const QString &addr);
 
+    QString theme() const
+    {
+        return theme_;
+    }
+    void setTheme(const QString &theme);
+
 signals:
     void autoInstallChanged(bool auto_install);
     void autoCleanCacheChanged(bool auto_clean_cache);
@@ -88,6 +96,7 @@ class AppSettings : public QObject
     void dataPathChanged(QString data_path);
     void keyStorePathChanged(QString keystore_path);
     void lastWirelessAddrChanged(QString addr);
+    void themeChanged(QString theme);
 
 private:
     void loadAppSettings();
@@ -100,6 +109,7 @@ class AppSettings : public QObject
     QString data_path_;
     QString keystore_path_;
     QString last_wireless_addr_;
+    QString theme_;
 };
 
 #endif /* QROOKIE_APP_SETTINGS */
diff --git a/src/main.cpp b/src/main.cpp
index 57266f0..dc93a29 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,87 +23,90 @@
 #include <QQuickStyle>
 #include <QRegularExpression>
 
+#include "app_settings.h"
 #include "device_manager.h"
 #include "qrookie.h"
 #include "vrp_manager.h"
 
 int main(int argc, char *argv[])
 {
-    QGuiApplication app(argc, argv);
-    app.setApplicationName(APPLICATION_NAME);
-    app.setApplicationVersion(APPLICATION_VERSION);
-    app.setDesktopFileName(APPLICATION_ID);
-
-#ifdef Q_OS_LINUX
-    if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
-        QQuickStyle::setStyle(QStringLiteral("org.kde.breeze"));
-    }
-#elif defined(Q_OS_MAC)
-    if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
-        QQuickStyle::setStyle(QStringLiteral("Material"));
-    }
-
-    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
-    QStringList icon_dirs = QIcon::themeSearchPaths();
-
-    // add XDG_DATA_DIRS/icons to the icon theme search path (for nix-darwin)
-    if (env.contains("XDG_DATA_DIRS")) {
-        QString xdg_data_dirs = env.value("XDG_DATA_DIRS");
-        QStringList data_dirs = xdg_data_dirs.split(QDir::listSeparator());
-        // QStringList icon_dirs;
-        for (auto dir : data_dirs) {
-            auto icon_dir = dir + "/icons";
-            if (QDir(icon_dir).exists()) {
-                icon_dirs.append(icon_dir);
+    int currentExitCode = 0;
+
+    do {
+        QGuiApplication app(argc, argv);
+        app.setApplicationName(APPLICATION_NAME);
+        app.setApplicationVersion(APPLICATION_VERSION);
+        app.setDesktopFileName(APPLICATION_ID);
+
+#if defined(Q_OS_LINUX) || defined(Q_OS_MAC)
+        if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
+            const QString theme = AppSettings::instance()->theme();
+            QQuickStyle::setStyle(theme);
+        }
+#endif
+#if defined(Q_OS_MAC)
+        QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+        QStringList icon_dirs = QIcon::themeSearchPaths();
+
+        // add XDG_DATA_DIRS/icons to the icon theme search path (for nix-darwin)
+        if (env.contains("XDG_DATA_DIRS")) {
+            QString xdg_data_dirs = env.value("XDG_DATA_DIRS");
+            QStringList data_dirs = xdg_data_dirs.split(QDir::listSeparator());
+            // QStringList icon_dirs;
+            for (auto dir : data_dirs) {
+                auto icon_dir = dir + "/icons";
+                if (QDir(icon_dir).exists()) {
+                    icon_dirs.append(icon_dir);
+                }
             }
         }
-    }
 
 #ifdef MACOS_BUNDLE
-    QString res_dir = QCoreApplication::applicationDirPath() + "/../Resources";
+        QString res_dir = QCoreApplication::applicationDirPath() + "/../Resources";
 
-    // add ../Resources to the PATH (for adb,7za,zipalign,apktool,apksigner)
-    QStringList path = env.value("PATH").split(QDir::listSeparator());
-    path.prepend(res_dir);
-    qputenv("PATH", path.join(QDir::listSeparator()).toUtf8());
+        // add ../Resources to the PATH (for adb,7za,zipalign,apktool,apksigner)
+        QStringList path = env.value("PATH").split(QDir::listSeparator());
+        path.prepend(res_dir);
+        qputenv("PATH", path.join(QDir::listSeparator()).toUtf8());
 
-    // add ../Resources/icons to the icon theme search path
-    icon_dirs += res_dir + "/icons";
+        // add ../Resources/icons to the icon theme search path
+        icon_dirs += res_dir + "/icons";
 #endif // MACOS_BUNDLE
 
-    QIcon::setThemeSearchPaths(icon_dirs);
-    QIcon::setThemeName("breeze");
-#endif
+        QIcon::setThemeSearchPaths(icon_dirs);
+        QIcon::setThemeName("breeze");
+#endif // Q_OS_MAC
 
-    qmlRegisterType<VrpManager>("VrpManager", 1, 0, "VrpManager");
-    qmlRegisterType<DeviceManager>("DeviceManager", 1, 0, "DeviceManager");
-    QCoro::Qml::registerTypes();
+        qmlRegisterType<VrpManager>("VrpManager", 1, 0, "VrpManager");
+        qmlRegisterType<DeviceManager>("DeviceManager", 1, 0, "DeviceManager");
+        QCoro::Qml::registerTypes();
 
-    QQmlApplicationEngine engine;
+        QQmlApplicationEngine engine;
 
 #ifdef MACOS_BUNDLE
-    engine.addImportPath(res_dir + "/kirigami");
+        engine.addImportPath(res_dir + "/kirigami");
 #endif
 
-    const QUrl url(u"qrc:/qt/qml/Main/main.qml"_qs);
-    QObject::connect(
-        &engine,
-        &QQmlApplicationEngine::objectCreated,
-        &app,
-        [url](QObject *obj, const QUrl &objUrl) {
-            if (!obj && url == objUrl)
-                QCoreApplication::exit(-1);
-        },
-        Qt::QueuedConnection);
+        const QUrl url(u"qrc:/qt/qml/Main/main.qml"_qs);
+        QObject::connect(
+            &engine,
+            &QQmlApplicationEngine::objectCreated,
+            &app,
+            [url](QObject *obj, const QUrl &objUrl) {
+                if (!obj && url == objUrl)
+                    QCoreApplication::exit(-1);
+            },
+            Qt::QueuedConnection);
 
-    engine.addImportPath(QCoreApplication::applicationDirPath() + "/qml");
-    engine.addImportPath(":/");
+        engine.addImportPath(QCoreApplication::applicationDirPath() + "/qml");
+        engine.addImportPath(":/");
 
-    engine.load(url);
+        engine.load(url);
 
-    if (engine.rootObjects().isEmpty()) {
-        return -1;
-    }
+        if (engine.rootObjects().isEmpty()) {
+            return -1;
+        }
 
-    return app.exec();
+        return currentExitCode = app.exec();
+    } while (currentExitCode == AppSettings::EXIT_RESTART);
 }
diff --git a/src/vrp_manager.cpp b/src/vrp_manager.cpp
index 6dec2df..2462951 100644
--- a/src/vrp_manager.cpp
+++ b/src/vrp_manager.cpp
@@ -19,6 +19,7 @@
 
 #include <QCoroTimer>
 #include <QDir>
+#include <QGUIApplication>
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QJsonObject>
@@ -609,3 +610,24 @@ QCoro::Task<bool> VrpManager::openGameFolder(const QString release_name)
     }
     co_return true;
 }
+
+QStringList VrpManager::compatibleThemes() const
+{
+#ifdef Q_OS_LINUX
+    return {"org.kde.breeze", "Universal"};
+#elif defined(Q_OS_MAC)
+    return {"Material", "Universal"};
+#elif defined(Q_OS_WIN)
+    return {"WindowsVista", "Universal"};
+#else
+    return {"Universal"};
+#endif
+}
+
+void VrpManager::restartMainApp()
+{
+    QString program = qApp->arguments()[0];
+    QStringList arguments = qApp->arguments().mid(1);
+    qApp->exit(AppSettings::EXIT_RESTART);
+    QProcess::startDetached(program, arguments);
+}
diff --git a/src/vrp_manager.h b/src/vrp_manager.h
index 84bfa14..7c7106d 100644
--- a/src/vrp_manager.h
+++ b/src/vrp_manager.h
@@ -41,6 +41,7 @@ class VrpManager : public QObject
     Q_ENUMS(SortType)
 
     Q_PROPERTY(QVariantList gamesInfo READ gamesInfo NOTIFY gamesInfoChanged)
+    Q_PROPERTY(QStringList compatibleThemes READ compatibleThemes CONSTANT)
     Q_PROPERTY(AppSettings *settings READ settings)
 
 public:
@@ -152,6 +153,10 @@ class VrpManager : public QObject
         return openGameFolder(release_name);
     }
 
+    QStringList compatibleThemes() const;
+
+    Q_INVOKABLE void restartMainApp();
+
 signals:
     void gamesInfoChanged();
     void statusChanged(QString release_name, Status status);