Estimated fee rates.

lib/src/screens/send/send_page.dart

@@ -761,6 +761,7 @@ class SendPage extends BasePage {
     await showPopUp<void>(
         builder: (_) => Picker(
               items: items,
+              displayItem: sendViewModel.displayFeeRate,
               selectedAtIndex: selectedItem,
               title: S.of(context).please_select,
               mainAxisAlignment: MainAxisAlignment.center,

lib/src/screens/settings/settings.dart

@@ -41,6 +41,7 @@ class SettingsPage extends BasePage {
           if (item is PickerListItem) {
             return Observer(builder: (_) {
               return SettingsPickerCell<dynamic>(
+                displayItem: item.displayItem,
                 title: item.title,
                 selectedItem: item.selectedItem(),
                 items: item.items,

lib/src/screens/settings/widgets/settings_picker_cell.dart

@@ -7,6 +7,7 @@ import 'package:cake_wallet/generated/i18n.dart';
 class SettingsPickerCell<ItemType> extends StandardListRow {
   SettingsPickerCell(
       {@required String title,
+      @required this.displayItem,
       this.selectedItem,
       this.items,
       this.onItemSelected})
@@ -20,6 +21,7 @@ class SettingsPickerCell<ItemType> extends StandardListRow {
                   context: context,
                   builder: (_) => Picker(
                       items: items,
+                      displayItem: displayItem,
                       selectedAtIndex: selectedAtIndex,
                       title: S.current.please_select,
                       mainAxisAlignment: MainAxisAlignment.center,
@@ -30,11 +32,12 @@ class SettingsPickerCell<ItemType> extends StandardListRow {
   final ItemType selectedItem;
   final List<ItemType> items;
   final void Function(ItemType item) onItemSelected;
+  final String Function(ItemType item) displayItem;
 
   @override
   Widget buildTrailing(BuildContext context) {
     return Text(
-      selectedItem.toString(),
+      displayItem?.call(selectedItem) ?? selectedItem.toString(),
       textAlign: TextAlign.right,
       style: TextStyle(
           fontSize: 14.0,