diff --git a/app/gui.py b/app/gui.py
index 86dd8c2..cedf434 100644
--- a/app/gui.py
+++ b/app/gui.py
@@ -1789,6 +1789,11 @@ class StorePage(QWidget):
         self.psp_filter.setToolTip("Filter by whether the archive matches a disc installed on the connected PSP")
         self.psp_filter.currentIndexChanged.connect(self._apply_filter)
         bar.addWidget(self.psp_filter)
+        self.store_sort = QComboBox()
+        self.store_sort.addItems(["Newest first", "Title (A–Z)", "Region (A–Z)", "Size (largest)", "In library first"])
+        self.store_sort.setToolTip("Sort the cover grid")
+        self.store_sort.currentTextChanged.connect(self._apply_filter)
+        bar.addWidget(self.store_sort)
         refresh_btn = QPushButton("Refresh")
         refresh_btn.clicked.connect(lambda: self.refresh(force=True))
         bar.addWidget(refresh_btn)
@@ -2046,7 +2051,7 @@ class StorePage(QWidget):
             if not it.get("release_date"):
                 it["release_date"] = dates.get((str(rid), system)) or ""
             filtered.append(it)
-        filtered.sort(key=self._store_sort_key)
+        self._sort_store_items(filtered)
         self._filtered = filtered
         if self.all_check.isChecked():
             show = len(filtered)
@@ -2054,6 +2059,19 @@ class StorePage(QWidget):
             show = min(self.RECENT_LIMIT, len(filtered))
         self._populate(filtered, show)
 
+    def _sort_store_items(self, items):
+        mode = self.store_sort.currentText()
+        if mode == "Title (A–Z)":
+            items.sort(key=lambda it: store.display_name(it["name"]).lower())
+        elif mode == "Region (A–Z)":
+            items.sort(key=lambda it: (store.region(it["name"]) or "").lower())
+        elif mode == "Size (largest)":
+            items.sort(key=lambda it: it.get("size") or 0, reverse=True)
+        elif mode == "In library first":
+            items.sort(key=lambda it: (not it.get("in_library"), store.display_name(it["name"]).lower()))
+        else:  # Newest first
+            items.sort(key=self._store_sort_key)
+
     @staticmethod
     def _store_sort_key(it):
         d = it.get("release_date") or ""
@@ -4366,6 +4384,11 @@ class MainWindow(QMainWindow):
         self.library_view = QComboBox()
         self.library_view.addItems(["Cover view", "List view"])
         bar.addWidget(self.library_view)
+        self.library_sort = QComboBox()
+        self.library_sort.addItems(["Title", "Release date", "Size", "Region", "Type", "Serial"])
+        self.library_sort.setToolTip("Sort the cover grid")
+        self.library_sort.currentTextChanged.connect(self._apply_library_filter)
+        bar.addWidget(self.library_sort)
         reload_btn = QPushButton("Reload")
         reload_btn.clicked.connect(self.load_library)
         bar.addWidget(reload_btn)
@@ -4633,12 +4656,30 @@ class MainWindow(QMainWindow):
             if psp_f == "Not on PSP" and it.get("on_psp"):
                 continue
             items.append(it)
+        self._sort_library_items(items)
         self._library_filtered = items
         self._populate_library_table(items)
         self.cover_grid.set_items(items)
         if hasattr(self, "psp_page"):
             self.psp_page.set_library_items(self._library_cache)
 
+    def _sort_library_items(self, items):
+        mode = self.library_sort.currentText()
+        title = lambda it: (it.get("title_override") or it.get("canonical") or it["name"] or "").lower()
+        if mode == "Release date":
+            items.sort(key=lambda it: it.get("release_date") or "", reverse=True)
+        elif mode == "Size":
+            items.sort(key=lambda it: it.get("size") or 0, reverse=True)
+        elif mode == "Region":
+            items.sort(key=lambda it: (it.get("region") or "").lower())
+        elif mode == "Type":
+            order = {"games": 0, "videos": 1, "ps1": 2, "theme": 3, "dlc": 4}
+            items.sort(key=lambda it: (order.get(it.get("system"), 9), title(it)))
+        elif mode == "Serial":
+            items.sort(key=lambda it: (it.get("serial") or "").lower())
+        else:  # Title
+            items.sort(key=title)
+
     def _populate_library_table(self, items):
         self.library_table.setUpdatesEnabled(False)
         self.library_table.setSortingEnabled(False)