diff --git a/green_walking/lib/l10n/app_en.arb b/green_walking/lib/l10n/app_en.arb
index 6695ee1..39285d3 100644
--- a/green_walking/lib/l10n/app_en.arb
+++ b/green_walking/lib/l10n/app_en.arb
@@ -363,7 +363,7 @@
   },
   "offlineMapsPage": "Offline maps (Beta)",
   "@offlineMapsPage": {
-    "description": "Navigation label and title for offline maps page"
+    "description": "Navigation label and title for the offline maps page"
   },
   "downloadNewOfflineMapButton": "Download new map",
   "@downloadNewOfflineMapButton": {
@@ -371,11 +371,11 @@
   },
   "downloadMapTitle": "Download offline map",
   "@downloadMapTitle": {
-    "description": "Title for download map page."
+    "description": "Title for the download map page."
   },
   "downloadMapButton": "Download area",
   "@downloadMapButton": {
-    "description": "Title for download map button."
+    "description": "Title for the download map button."
   },
   "offlineMapCardTitle": "Map",
   "@offlineMapCardTitle": {
@@ -417,7 +417,7 @@
   },
   "downloadMapDialogEstimateResult": "Estimation:\n{storageSize} storage\n{networkTransferSize} network transfer",
   "@downloadMapDialogEstimateResult": {
-    "description": "Text shown while estimating the required storage space.",
+    "description": "Displayed estimates to download the selected map area.",
     "placeholders": {
       "storageSize": {
         "type": "String",
diff --git a/green_walking/lib/library/util.dart b/green_walking/lib/library/util.dart
index e89fc10..61e1821 100644
--- a/green_walking/lib/library/util.dart
+++ b/green_walking/lib/library/util.dart
@@ -11,8 +11,8 @@ String? truncateString(String? myString, int? cutoff) {
 }
 
 String formatBytes(int bytes, int decimals) {
-  if (bytes <= 0) return "0 B";
-  const suffixes = ["B", "KB", "MB", "GB", "TB"];
-  var i = (log(bytes) / log(1024)).floor();
+  if (bytes <= 0) return '0 B';
+  const suffixes = ['B', 'KB', 'MB', 'GB', 'TB'];
+  final i = (log(bytes) / log(1024)).floor();
   return '${(bytes / pow(1024, i)).toStringAsFixed(decimals)} ${suffixes[i]}';
 }
diff --git a/green_walking/lib/widgets/offline/download_map_dialog.dart b/green_walking/lib/widgets/offline/download_map_dialog.dart
index f5cbfe9..7253580 100644
--- a/green_walking/lib/widgets/offline/download_map_dialog.dart
+++ b/green_walking/lib/widgets/offline/download_map_dialog.dart
@@ -29,7 +29,7 @@ class DownloadMapDialog extends StatelessWidget {
                 }
                 if (snapshot.hasError) {
                   // TODO: Translate
-                  return Text('Failed to estimate amount of storage: ${snapshot.error}');
+                  return Text('Failed to estimate storage space: ${snapshot.error}');
                 }
                 return Row(
                   children: [
diff --git a/green_walking/lib/widgets/offline/offline_map_card.dart b/green_walking/lib/widgets/offline/offline_map_card.dart
index 24f746e..64a59fd 100644
--- a/green_walking/lib/widgets/offline/offline_map_card.dart
+++ b/green_walking/lib/widgets/offline/offline_map_card.dart
@@ -9,7 +9,7 @@ class OfflineMapCard extends StatelessWidget {
 
   final TileRegion region;
   final TileStore tileStore;
-  final void Function()? onDelete;
+  final void Function() onDelete;
 
   @override
   Widget build(BuildContext context) {
@@ -45,7 +45,7 @@ class OfflineMapStyleCard extends StatelessWidget {
 
   final StylePack stylePack;
   final bool canBeDeleted;
-  final void Function()? onDelete;
+  final void Function() onDelete;
 
   @override
   Widget build(BuildContext context) {