diff --git a/devtools_options.yaml b/devtools_options.yaml
new file mode 100644
index 0000000..fa0b357
--- /dev/null
+++ b/devtools_options.yaml
@@ -0,0 +1,3 @@
+description: This file stores settings for Dart & Flutter DevTools.
+documentation: https://docs.flutter.dev/tools/devtools/extensions#configure-extension-enablement-states
+extensions:
diff --git a/lib/screens/home_screen.dart b/lib/screens/home_screen.dart
index b7e173c..e5d9642 100644
--- a/lib/screens/home_screen.dart
+++ b/lib/screens/home_screen.dart
@@ -131,10 +131,7 @@ class _DownloadAreaDialogState extends State<DownloadAreaDialog> {
     }
     final minZoom = OfflineAreaService().findDynamicMinZoom(bounds);
     final maxZoom = _zoom.toInt();
-    final allTiles = OfflineAreaService().computeTileList(bounds, minZoom, maxZoom);
-    final worldTiles = OfflineAreaService().computeTileList(
-        OfflineAreaService().globalWorldBounds(), 1, 4);
-    final nTiles = allTiles.length + worldTiles.length;
+    final nTiles = OfflineAreaService().computeTileList(bounds, minZoom, maxZoom).length;
     const kbPerTile = 6.5; // Empirically ~6.5kB average for OSM tiles at z=1-19
     final totalMb = (nTiles * kbPerTile) / 1024.0;
     setState(() {
diff --git a/lib/services/offline_area_service.dart b/lib/services/offline_area_service.dart
index b8e2e19..e8407dd 100644
--- a/lib/services/offline_area_service.dart
+++ b/lib/services/offline_area_service.dart
@@ -193,10 +193,13 @@ class OfflineAreaService {
     await saveAreasToDisk();
 
     try {
-      // STEP 1: Tiles (incl. global z=1..4)
-      final tileTasks = computeTileList(bounds, minZoom, maxZoom);
-      final globalTiles = computeTileList(globalWorldBounds(), 1, 4);
-      final allTiles = {...tileTasks, ...globalTiles};
+      // STEP 1: Tiles: user areas get only their bbox/zooms; world area gets only global z=1..4
+      Set<List<int>> allTiles;
+      if (area.isPermanent) {
+        allTiles = computeTileList(globalWorldBounds(), 1, 4);
+      } else {
+        allTiles = computeTileList(bounds, minZoom, maxZoom);
+      }
       area.tilesTotal = allTiles.length;
 
       int done = 0;