diff --git a/lib/presentation/molecules/energy_selection_molecule.dart b/lib/presentation/molecules/energy_selection_molecule.dart
index b91ba9c..c82bd65 100644
--- a/lib/presentation/molecules/energy_selection_molecule.dart
+++ b/lib/presentation/molecules/energy_selection_molecule.dart
@@ -39,16 +39,17 @@ class _EnergySelectionMoleculeState extends State<EnergySelectionMolecule> {
 
   Widget energyWidget(EnergyType type) {
     final EnergyLevel timerStatesTemp = EnergyLevel.fromEnergyType(type);
-    String subtitle = '';
+    final StringBuffer subtitleBuffer = StringBuffer();
 
     final TimerSession firstTimerState = timerStatesTemp.sessions.first;
 
     for (final TimerSession timerState in timerStatesTemp.sessions) {
       if (timerState != firstTimerState) {
-        subtitle += ' -> ';
+        subtitleBuffer.write(' -> ');
       }
-      subtitle =
-          '$subtitle${timerState.study.inMinutes}m study -> ${timerState.breakDuration.inMinutes}m break';
+      subtitleBuffer.write(
+        '${timerState.study.inMinutes}m study -> ${timerState.breakDuration.inMinutes}m break',
+      );
     }
 
     final bool showTipButton = timerStatesTemp.type.tipsId != null &&
@@ -61,7 +62,7 @@ class _EnergySelectionMoleculeState extends State<EnergySelectionMolecule> {
       },
       child: ListTileAtom(
         '${type.previewName.tr()} - ${type.duration.inMinutes}${'minutes_single'.tr()}',
-        subtitle: subtitle,
+        subtitle: subtitleBuffer.toString(),
         leading: Radio<EnergyType>(
           value: type,
           groupValue: timerStates.type,
diff --git a/lib/presentation/pages/home_page.dart b/lib/presentation/pages/home_page.dart
index b1663b4..9da1a88 100644
--- a/lib/presentation/pages/home_page.dart
+++ b/lib/presentation/pages/home_page.dart
@@ -30,8 +30,9 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
     super.initState();
     WidgetsBinding.instance.addObserver(this);
     PlayerController.instance.setIsSound(
-        PreferencesController.instance.getBool(PreferenceKeys.isSound.name) ??
-            true);
+      PreferencesController.instance.getBool(PreferenceKeys.isSound.name) ??
+          true,
+    );
     PlayerController.instance.play('start_session.wav');
     VibrationController.instance.vibrate(VibrationType.heavy);
     TimerStateManager.iterateOverTimerStates();
@@ -93,7 +94,9 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver {
         PreferencesController.instance
             .setDateTime(PreferenceKeys.pausedTime.name, DateTime.now());
         PreferencesController.instance.setString(
-            PreferenceKeys.timerState.name, TimerStateManager.state.name);
+          PreferenceKeys.timerState.name,
+          TimerStateManager.state.name,
+        );
         PreferencesController.instance.setDuration(
           PreferenceKeys.remainingTimerTime.name,
           TimerStateManager.remainingTime ?? Duration.zero,