diff --git a/lib/src/model/over_the_board/over_the_board_clock.dart b/lib/src/model/over_the_board/over_the_board_clock.dart
index 248f7dc38a..475b247c88 100644
--- a/lib/src/model/over_the_board/over_the_board_clock.dart
+++ b/lib/src/model/over_the_board/over_the_board_clock.dart
@@ -93,6 +93,16 @@ class OverTheBoardClock extends _$OverTheBoardClock {
 
     state = state.copyWith(activeClock: newSideToMove);
   }
+
+  void giveTime(Duration amount) {
+    final newTime = state.timeLeft(state.activeClock!)! + amount;
+
+    if (state.activeClock == Side.white) {
+      state = state.copyWith(whiteTimeLeft: newTime);
+    } else {
+      state = state.copyWith(blackTimeLeft: newTime);
+    }
+  }
 }
 
 @freezed
diff --git a/lib/src/view/over_the_board/over_the_board_screen.dart b/lib/src/view/over_the_board/over_the_board_screen.dart
index 685d76690a..62945fb507 100644
--- a/lib/src/view/over_the_board/over_the_board_screen.dart
+++ b/lib/src/view/over_the_board/over_the_board_screen.dart
@@ -329,6 +329,12 @@ class _BottomBar extends ConsumerWidget {
               );
             },
           ),
+        BottomSheetAction(
+          makeLabel: (context) => const Text('Give 15 seconds.'),
+          onPressed: () {
+            ref.read(overTheBoardClockProvider.notifier).giveTime(const Duration(seconds: 15));
+          },
+        ),
       ],
     );
   }