diff --git a/CMakeLists.txt b/CMakeLists.txt
index 19ee3df..a61d79a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,11 +65,13 @@ set(SOURCE_FILES
     inc/spkpageuitest.h gui/spkpageuitest.cpp
     inc/spkloading.h gui/spkloading.cpp
     inc/spksidebartree.h gui/spksidebartree.cpp
+    inc/spkappitem.h gui/spkappitem.cpp
     inc/spkpopup.h gui/spkpopup.cpp
 
     inc/spkstore.h src/spkstore.cpp
     inc/spkuimsg.h src/spkuimsg.cpp
     inc/spklogging.h src/spklogging.cpp
+    inc/spkresource.h src/spkresource.cpp
     )
 
 include(cmake/FindLibNotify.cmake)
diff --git a/gui/spkappitem.cpp b/gui/spkappitem.cpp
new file mode 100644
index 0000000..70ae843
--- /dev/null
+++ b/gui/spkappitem.cpp
@@ -0,0 +1,45 @@
+
+#include <QPainter>
+#include <QStyleOption>
+#include "spkappitem.h"
+
+SpkAppItem::SpkAppItem(QWidget *parent) : QWidget(parent)
+{
+  mMainLay = new QHBoxLayout(this);
+  mLayText = new QVBoxLayout;
+
+  mIcon = new QLabel;
+  mIcon->setFixedSize(IconSize, IconSize);
+  mIcon->setAutoFillBackground(false);
+
+  mTitle = new QLabel;
+  mTitle->setWordWrap(false);
+  mTitle->setObjectName("styAppItmTitle");
+  mTitle->setAutoFillBackground(true);
+  mDescription = new QLabel;
+  mDescription->setWordWrap(true);
+  mDescription->setObjectName("styAppItmDesc");
+  mDescription->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+  mDescription->setAlignment(Qt::AlignTop | Qt::AlignLeft);
+  mDescription->setAutoFillBackground(true);
+  mLayText->addWidget(mTitle);
+  mLayText->addWidget(mDescription);
+  mLayText->setAlignment(Qt::AlignTop);
+
+  mMainLay->addWidget(mIcon);
+  mMainLay->addLayout(mLayText);
+
+  setMinimumHeight(82);
+  setMaximumHeight(82);
+  setMinimumWidth(300);
+  setMaximumWidth(350);
+}
+
+void SpkAppItem::paintEvent(QPaintEvent *e)
+{
+    Q_UNUSED(e)
+    QStyleOption opt;
+    opt.init(this);
+    QPainter p(this);
+    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
+}
diff --git a/gui/spkdialog.cpp b/gui/spkdialog.cpp
index bf5a8d8..81c2ce7 100644
--- a/gui/spkdialog.cpp
+++ b/gui/spkdialog.cpp
@@ -44,10 +44,10 @@ void SpkDialog::AddButton(QString text, SpkUi::SpkButtonStyle style)
   {
 
     case SpkUi::SpkButtonStyle::Recommend:
-      b->setObjectName("spk_styling_recommendbtn");
+      b->setObjectName("sty_recommendbtn");
       break;
     case SpkUi::SpkButtonStyle::Warn:
-      b->setObjectName("spk_styling_warnbtn");
+      b->setObjectName("sty_warnbtn");
       break;
     default:
       break;
diff --git a/gui/spkloading.cpp b/gui/spkloading.cpp
index f7cffd2..7281d42 100644
--- a/gui/spkloading.cpp
+++ b/gui/spkloading.cpp
@@ -4,7 +4,7 @@
 #include "spkloading.h"
 #include "spkui_general.h"
 
-SpkLoading::SpkLoading(QWidget *parent) : QWidget(parent)
+SpkLoading::SpkLoading(QWidget *parent) : QFrame(parent)
 {
   setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
   mAnimTimer = new QTimeLine(400, this);
diff --git a/gui/spkmainwindow.cpp b/gui/spkmainwindow.cpp
index f112dc0..10069d8 100644
--- a/gui/spkmainwindow.cpp
+++ b/gui/spkmainwindow.cpp
@@ -103,8 +103,8 @@ SpkUi::SpkMainWidget::SpkMainWidget(QWidget *parent) : QFrame(parent)
   SideBarRestrictor = new QWidget(this);
   SideBarRestrictor->setObjectName("spk_mw_sidebar_restrictor");
   SideBarRestrictor->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
-  SideBarRestrictor->setMaximumWidth(300);
-  SideBarRestrictor->setMinimumWidth(300);
+  SideBarRestrictor->setMaximumWidth(200);
+  SideBarRestrictor->setMinimumWidth(200);
   SideBarRestrictor->setLayout(VLaySidebar);
 
   HLaySideTop = new QHBoxLayout;
@@ -123,7 +123,7 @@ SpkUi::SpkMainWidget::SpkMainWidget(QWidget *parent) : QFrame(parent)
   SidebarMgr->setObjectName("spk_mw_sidebar_mgr");
 
   BtnSettings = new QPushButton(this);
-  BtnSettings->setObjectName("spk_styling_plaincheckbtn");
+  BtnSettings->setObjectName("styPlainChkBtn");
   BtnSettings->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
   BtnSettings->setCheckable(true);
   BtnSettings->setMaximumSize({ 48, 48 });
@@ -140,7 +140,7 @@ SpkUi::SpkMainWidget::SpkMainWidget(QWidget *parent) : QFrame(parent)
 
   using SpkUi::SpkSidebarSelector;
   CategoryWidget = new SpkSidebarTree(this);
-  CategoryWidget->setObjectName("spk_mw_category");
+  CategoryWidget->setObjectName("styMwCateg");
   CategoryWidget->setAutoFillBackground(true);
   CategoryWidget->setColumnCount(1);
   CategoryWidget->setHeaderHidden(true);
diff --git a/gui/spkmsgbox.cpp b/gui/spkmsgbox.cpp
index 070203e..639ece4 100644
--- a/gui/spkmsgbox.cpp
+++ b/gui/spkmsgbox.cpp
@@ -82,7 +82,7 @@ int SpkMsgBox::StaticExec(QString msg, QString title, QMessageBox::Icon icon,
     wExpandBtn->setMaximumWidth(100);
     wExpandBtn->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
     wExpandBtn->setCheckable(true);
-    wExpandBtn->setObjectName("spk_styling_checkbtn");
+    wExpandBtn->setObjectName("styChkBtn");
     connect(wExpandBtn, &QPushButton::clicked,
             [&](){  // FIXME: hint doesn't change when visibility changes, this is a quirky hack
                     wExtraArea->setVisible(wExpandBtn->isChecked());
diff --git a/gui/spkpageuitest.cpp b/gui/spkpageuitest.cpp
index ae35da7..5894eb3 100644
--- a/gui/spkpageuitest.cpp
+++ b/gui/spkpageuitest.cpp
@@ -44,6 +44,13 @@ SpkUi::SpkPageUiTest::SpkPageUiTest(QWidget *parent) : QSplitter(parent)
   Loading->setObjectName("spk_pg_qsstest_loading");
   Loading->start();
 
+  AppItem = new SpkAppItem(this);
+  AppItem->setObjectName("spk_pg_qsstest_appitem");
+  AppItem->SetTitle("Lorem Ipsum");
+  AppItem->SetDescription("Nam vehicula lacus vitae leo fermentum efficitur. "
+                          "Phasellus finibus risus id aliquam pulvinar.");
+  AppItem->SetIcon(QIcon::fromTheme("dialog-information").pixmap(72, 72));
+
   PopupText = new QLineEdit(this);
   PopupText->setObjectName("spk_pg_qsstest_poptext");
   PopupText->setText("Hello, world");
@@ -68,20 +75,21 @@ SpkUi::SpkPageUiTest::SpkPageUiTest(QWidget *parent) : QSplitter(parent)
   SlideH->setMaximum(1000);
   SlideH->setMinimum(0);
 
-  VLayBtn = new QVBoxLayout;
-  VLayBtn->setObjectName("spk_pg_qsstest_vlay_btn");
-  VLayBtn->addWidget(Btn);
-  VLayBtn->addWidget(Chk);
-  VLayBtn->addWidget(Rad);
-  VLayBtn->addWidget(Loading);
-  VLayBtn->addWidget(PopupText);
-  VLayBtn->addWidget(ShowPopup);
-  VLayBtn->addWidget(ShowAbout);
+  VLayTestWidgets = new QVBoxLayout;
+  VLayTestWidgets->setObjectName("spk_pg_qsstest_vlay_btn");
+  VLayTestWidgets->addWidget(Btn);
+  VLayTestWidgets->addWidget(Chk);
+  VLayTestWidgets->addWidget(Rad);
+  VLayTestWidgets->addWidget(Loading);
+  VLayTestWidgets->addWidget(PopupText);
+  VLayTestWidgets->addWidget(ShowPopup);
+  VLayTestWidgets->addWidget(ShowAbout);
+  VLayTestWidgets->addWidget(AppItem);
 
   Group = new QGroupBox(this);
   Group->setObjectName("spk_pg_qsstest_groupbox");
   Group->setTitle("GroupBox");
-  Group->setLayout(VLayBtn);
+  Group->setLayout(VLayTestWidgets);
 
   VLayInput = new QVBoxLayout;
   VLayInput->setObjectName("spk_pg_qsstest_inputlay");
diff --git a/inc/spkappitem.h b/inc/spkappitem.h
new file mode 100644
index 0000000..a589f12
--- /dev/null
+++ b/inc/spkappitem.h
@@ -0,0 +1,31 @@
+
+#pragma once
+
+#include <QLabel>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+
+class SpkAppItem : public QWidget
+{
+    Q_OBJECT
+  public:
+    SpkAppItem(QWidget *parent = nullptr);
+
+    void SetIcon(QPixmap p) { mIcon->setPixmap(p); }
+    void SetTitle(QString s) { mTitle->setText(s); }
+    void SetDescription(QString s) { mDescription->setText(s); }
+
+  protected:
+    void paintEvent(QPaintEvent *e);
+
+  private:
+    QLabel *mIcon;
+    QLabel *mTitle;
+    QLabel *mDescription;
+
+    QVBoxLayout *mLayText;
+    QHBoxLayout *mMainLay;
+
+    static constexpr int IconSize = 72;
+};
+
diff --git a/inc/spkloading.h b/inc/spkloading.h
index e9bf182..7a88f67 100644
--- a/inc/spkloading.h
+++ b/inc/spkloading.h
@@ -1,10 +1,10 @@
 
 #pragma once
 
-#include <QWidget>
+#include <QFrame>
 #include <QTimeLine>
 
-class SpkLoading : public QWidget
+class SpkLoading : public QFrame
 {
     Q_OBJECT
   public:
diff --git a/inc/spkmainwindow.h b/inc/spkmainwindow.h
index 5a8ce8a..1e39137 100644
--- a/inc/spkmainwindow.h
+++ b/inc/spkmainwindow.h
@@ -43,20 +43,20 @@ namespace SpkUi
       constexpr static int RoleItemCategoryPageId= Qt::UserRole + 2;
       void BindPageSwitcherButton(QAbstractButton* w)
       {
-        connect(w, &QAbstractButton::pressed,
+        connect(w, &QAbstractButton::toggled,
                 this, &SpkSidebarSelector::ButtonPressed);
       }
       void BindCategoryWidget(QTreeWidget* w)
       {
         mCategoryWidget = w;
-        connect(w, &QTreeWidget::itemClicked, this,
+        connect(w, &QTreeWidget::itemPressed, this,
                 &SpkSidebarSelector::TreeItemSelected);
       }
       void AddUnusableItem(QTreeWidgetItem *i) { mUnusableItems.append(i); }
 
     private slots:
       // We assume the objects in interest all have the correct properties
-      void ButtonPressed()
+      void ButtonPressed(bool aBtnState)
       {
         auto b = qobject_cast<QPushButton*>(sender());
         if(mLastCheckedBtn)
@@ -67,11 +67,7 @@ namespace SpkUi
             mLastCheckedBtn = nullptr;
           }
           else
-            // NOTE:
-            // Apparently for checkable buttons, Qt flip their checked property AFTER
-            // this slot function. So to prevent a checkable button being unchecked,
-            // we set it to unchecked here. Qt will flip it back to checked later.
-            b->setChecked(false);
+            b->setChecked(aBtnState);
         }
         else if(mLastSelectedItem)
         {
diff --git a/inc/spkpageuitest.h b/inc/spkpageuitest.h
index 49065e5..ea7cbcd 100644
--- a/inc/spkpageuitest.h
+++ b/inc/spkpageuitest.h
@@ -11,6 +11,7 @@
 #include <QVBoxLayout>
 #include <QHBoxLayout>
 #include <QSlider>
+#include "spkappitem.h"
 
 #include "spkloading.h"
 
@@ -23,7 +24,7 @@ namespace SpkUi
       SpkPageUiTest(QWidget *parent = nullptr);
       QWidget *WidL, *WidR;
       QVBoxLayout *VLayWidgets,
-                  *VLayBtn,
+                  *VLayTestWidgets,
                   *VLayInput;
       QHBoxLayout *HLay4Slider,
                   *HLayInputBtns;
@@ -38,6 +39,7 @@ namespace SpkUi
       QSlider *SlideH;
       QSlider *SlideV;
       SpkLoading *Loading;
+      SpkAppItem *AppItem;
 
       QLineEdit *PopupText;
       QPushButton *ShowPopup,
diff --git a/inc/spkresource.h b/inc/spkresource.h
new file mode 100644
index 0000000..ffcb96f
--- /dev/null
+++ b/inc/spkresource.h
@@ -0,0 +1,4 @@
+#ifndef SPKRESOURCE_H
+#define SPKRESOURCE_H
+
+#endif // SPKRESOURCE_H
diff --git a/inc/spkui_general.h b/inc/spkui_general.h
index 5461a61..7d08c3f 100644
--- a/inc/spkui_general.h
+++ b/inc/spkui_general.h
@@ -45,7 +45,6 @@ namespace SpkUi
       static UiMetaObject *sGlobalInstance;
     public:
       UiMetaObject() {}
-      UiMetaObject *Instance() {return nullptr;} //FIXME!!
     public slots:
       void SetAccentColor(QColor);
   };
diff --git a/resource/stylesheets/mainwindow_dark.css b/resource/stylesheets/mainwindow_dark.css
index 7f801fa..9a67b13 100644
--- a/resource/stylesheets/mainwindow_dark.css
+++ b/resource/stylesheets/mainwindow_dark.css
@@ -22,32 +22,37 @@ QWidget
     color: #ffffff;
 }
 
-#spk_mw_category
+QLabel
+{
+    background: transparent;
+}
+
+#styMwCateg
 {
     border: none;
     font-size: 14px;
     show-decoration-selected: 1;
 }
 
-#spk_mw_category::item
+#styMwCateg::item
 {
     height: 35px;
     border: none;
     color: %13;
 }
 
-#spk_mw_category::item:selected
+#styMwCateg::item:selected
 {
     color: %11;
     background-color: %4;
 }
 
-#spk_mw_category::branch:!has-children
+#styMwCateg::branch:!has-children
 {
     background: %1;
 }
 
-#spk_mw_category::branch:selected
+#styMwCateg::branch:selected
 {
     background-color: %4;
 }
@@ -83,34 +88,34 @@ QPushButton::pressed
     background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 %8, stop:1 %6)
 }
 
-#spk_styling_checkbtn
+#styChkBtn
 {
     border-width: 0px;
     background-color: %9
 }
 
-#spk_styling_checkbtn:pressed
+#styChkBtn:pressed
 {
     background-color: %5
 }
 
-#spk_styling_checkbtn:checked
+#styChkBtn:checked
 {
     background-color: %4
 }
 
-#spk_styling_plaincheckbtn
+#styPlainChkBtn
 {
     border-width: 0px;
     background-color: %1
 }
 
-#spk_styling_plaincheckbtn:pressed
+#styPlainChkBtn:pressed
 {
     background-color: %5
 }
 
-#spk_styling_plaincheckbtn:checked
+#styPlainChkBtn:checked
 {
     background-color: %4
 }
@@ -157,7 +162,19 @@ QScrollBar::add-line, QScrollBar::sub-line
     height:0px
 }
 
-#spk_about_desc
+#styAboutDesc
 {
     color: %14
 }
+
+SpkAppItem
+{
+    background: %10;
+    border-radius: 11px;
+}
+
+#styAppItmTitle
+{
+    font-weight: 500;
+    font-size: 17px;
+}
diff --git a/src/spkresource.cpp b/src/spkresource.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/spkuimsg.cpp b/src/spkuimsg.cpp
index 55b3a14..602b34a 100644
--- a/src/spkuimsg.cpp
+++ b/src/spkuimsg.cpp
@@ -24,9 +24,11 @@ void SpkUiMessage::SendDesktopNotification(QString s, const char * const icon)
   notify_notification_show(_notify, nullptr);
 }
 
-void SpkUiMessage::SendStoreNotification(QString s) // TODO: IMPLEMENT IN-APP NOTIFICATION
+void SpkUiMessage::SendStoreNotification(QString s)
 {
-  SpkUi::Popup->Show(s);
+  // I don't really understand these measures of preventing copying really well,
+  // but Clang-tidy said so, so I did as instructed.
+  SpkUi::Popup->Show(std::move(s));
 }
 
 void SpkUiMessage::SetDesktopNotifyTimeout(int ms)