diff --git a/internal/core/core.go b/internal/core/core.go
index 4ab0904..43f7aab 100644
--- a/internal/core/core.go
+++ b/internal/core/core.go
@@ -17,8 +17,8 @@ var loop int
 /*
 Create a new TwentyTwentyTwenty struct.
 */
-func New(optional Optional, settings Settings) *TwentyTwentyTwenty {
-	return &TwentyTwentyTwenty{Optional: optional, Settings: settings}
+func New(features Features, settings Settings) *TwentyTwentyTwenty {
+	return &TwentyTwentyTwenty{Features: features, Settings: settings}
 }
 
 /*
@@ -36,7 +36,7 @@ This will start the main twenty-twenty-twenty loop in a goroutine, so avoid
 calling this function inside a goroutine.
 */
 func (t *TwentyTwentyTwenty) Start() {
-	if t.Optional.Sound {
+	if t.Features.Sound {
 		log.Printf(
 			"Running twenty-twenty-twenty every %.1f minute(s), with %.f second(s) duration and sound set to %t\n",
 			t.Settings.Frequency.Minutes(),
@@ -134,7 +134,7 @@ func (t *TwentyTwentyTwenty) loop() {
 			log.Printf("Showing notification for %.f second(s)\n", t.Settings.Duration.Seconds())
 			// wait 1.5x the duration so we have some time for the sounds to
 			// finish playing
-			if t.Optional.Sound {
+			if t.Features.Sound {
 				go sound.SuspendAfter(min(t.Settings.Duration*3/2, t.Settings.Frequency))
 			}
 			err := notification.SendWithDuration(
diff --git a/internal/core/core_test.go b/internal/core/core_test.go
index 2be78fa..d6d3d8a 100644
--- a/internal/core/core_test.go
+++ b/internal/core/core_test.go
@@ -41,7 +41,7 @@ func newMockNotifier() *mockNotifier {
 var (
 	notifier *mockNotifier
 	twenty   = New(
-		Optional{
+		Features{
 			Sound:   false,
 			Systray: false,
 		},
diff --git a/internal/core/flags.go b/internal/core/flags.go
index 5881b87..1b44592 100644
--- a/internal/core/flags.go
+++ b/internal/core/flags.go
@@ -11,7 +11,7 @@ func ParseFlags(
 	progname string,
 	args []string,
 	version string,
-	optional Optional,
+	features Features,
 ) Settings {
 	flags := flag.NewFlagSet(progname, flag.ExitOnError)
 	durationInSec := flags.Uint(
@@ -25,7 +25,7 @@ func ParseFlags(
 		"how often the pause should be in seconds",
 	)
 	pauseInSec := new(uint)
-	if optional.Systray {
+	if features.Systray {
 		pauseInSec = flags.Uint(
 			"pause",
 			60*60,
@@ -33,7 +33,7 @@ func ParseFlags(
 		)
 	}
 	disableSound := new(bool)
-	if optional.Sound {
+	if features.Sound {
 		disableSound = flags.Bool(
 			"disable-sound",
 			false,
@@ -62,7 +62,7 @@ func ParseFlags(
 		Duration:  time.Duration(*durationInSec) * time.Second,
 		Frequency: time.Duration(*frequencyInSec) * time.Second,
 		Pause:     time.Duration(*pauseInSec) * time.Second,
-		Sound:     optional.Sound && !*disableSound,
+		Sound:     features.Sound && !*disableSound,
 		Verbose:   *verbose,
 	}
 }
diff --git a/internal/core/flags_test.go b/internal/core/flags_test.go
index 10e695a..4923e6b 100644
--- a/internal/core/flags_test.go
+++ b/internal/core/flags_test.go
@@ -13,7 +13,7 @@ func TestParseFlags(t *testing.T) {
 	const version = "test"
 
 	// always return false for sound if disabled
-	settings := ParseFlags(progname, []string{}, version, Optional{Sound: false, Systray: false})
+	settings := ParseFlags(progname, []string{}, version, Features{Sound: false, Systray: false})
 	assert.Equal(t, settings.Sound, false)
 
 	var tests = []struct {
@@ -28,7 +28,7 @@ func TestParseFlags(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(strings.Join(tt.args, " "), func(t *testing.T) {
-			settings := ParseFlags(progname, tt.args, version, Optional{Sound: true, Systray: true})
+			settings := ParseFlags(progname, tt.args, version, Features{Sound: true, Systray: true})
 			assert.Equal(t, settings, tt.settings)
 		})
 	}
diff --git a/internal/core/structs.go b/internal/core/structs.go
index d5f5208..5bef09a 100644
--- a/internal/core/structs.go
+++ b/internal/core/structs.go
@@ -12,8 +12,8 @@ TwentyTwentyTwenty struct.
 Keeps the main state of the program.
 */
 type TwentyTwentyTwenty struct {
-	Optional Optional
-	Settings Settings
+	Features
+	Settings
 
 	cancelLoopCtx context.CancelFunc
 	loopCtx       context.Context
@@ -21,12 +21,12 @@ type TwentyTwentyTwenty struct {
 }
 
 /*
-Optional struct.
+Features struct.
 
 This is used for features that are optional in the program, for example if sound
 or systray are permanently disabled.
 */
-type Optional struct {
+type Features struct {
 	Sound   bool
 	Systray bool
 }
diff --git a/main.go b/main.go
index 8d47840..16d9988 100644
--- a/main.go
+++ b/main.go
@@ -30,19 +30,19 @@ func main() {
 	logger := slog.New(handler)
 	slog.SetDefault(logger)
 
-	optional := core.Optional{Sound: sound.Enabled, Systray: systrayEnabled}
-	settings := core.ParseFlags(os.Args[0], os.Args[1:], version, optional)
+	features := core.Features{Sound: sound.Enabled, Systray: systrayEnabled}
+	settings := core.ParseFlags(os.Args[0], os.Args[1:], version, features)
 
 	if settings.Verbose {
 		lvl.Set(slog.LevelDebug)
 	}
 
-	if optional.Sound {
+	if features.Sound {
 		err := sound.Init(!settings.Sound)
 		if err != nil {
 			log.Printf("Error while initialising sound: %v\n", err)
 			log.Println("Disabling sound")
-			optional.Sound = false
+			features.Sound = false
 			settings.Sound = false
 		}
 	}
@@ -55,13 +55,13 @@ func main() {
 	if err != nil {
 		log.Fatalf("Test notification failed: %v. Exiting...", err)
 	}
-	twenty = core.New(optional, settings)
+	twenty = core.New(features, settings)
 	// we need to start notification cancellation in a goroutine to show the
 	// systray as soon as possible (since it depends on the loop() call), but we
 	// also need to give it access to the core.Ctx to cancel it if necessary
 	twenty.Start()
 	go func() {
-		if optional.Sound {
+		if features.Sound {
 			// wait the 1.5x of duration so we have some time for the sounds to
 			// finish playing
 			go sound.SuspendAfter(min(settings.Duration*3/2, settings.Frequency))
diff --git a/systray.go b/systray.go
index 86bfce9..fe8f02c 100644
--- a/systray.go
+++ b/systray.go
@@ -30,7 +30,7 @@ func onReady() {
 		false,
 	)
 	mSound := new(systray.MenuItem)
-	if twenty.Optional.Sound {
+	if twenty.Features.Sound {
 		mSound = systray.AddMenuItemCheckbox("Sound", "Enable notification sound", twenty.Settings.Sound)
 	}
 	systray.AddSeparator()