diff --git a/README.md b/README.md
index 3f5c6c5..30b83df 100644
--- a/README.md
+++ b/README.md
@@ -22,4 +22,5 @@ go build -o pomodoro main.go
 
 ## Requirements
 
-- Go 1.18+
+- [Go](https://go.dev) 1.18+
+- [terminal-notifier](https://github.com/julienXX/terminal-notifier)
diff --git a/go.sum b/go.sum
index 6cacb45..9b11f9a 100644
--- a/go.sum
+++ b/go.sum
@@ -4,20 +4,14 @@ github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u
 github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
 github.com/charmbracelet/bubbletea v1.3.5 h1:JAMNLTbqMOhSwoELIr0qyP4VidFq72/6E9j7HHmRKQc=
 github.com/charmbracelet/bubbletea v1.3.5/go.mod h1:TkCnmH+aBd4LrXhXcqrKiYwRs7qyQx5rBgH5fVY3v54=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
 github.com/charmbracelet/colorprofile v0.3.1 h1:k8dTHMd7fgw4bnFd7jXTLZrSU/CQrKnL3m+AxCzDz40=
 github.com/charmbracelet/colorprofile v0.3.1/go.mod h1:/GkGusxNs8VB/RSOh3fu0TJmQ4ICMMPApIIVn0KszZ0=
 github.com/charmbracelet/harmonica v0.2.0 h1:8NxJWRWg/bzKqqEaaeFNipOu77YR5t8aSwG4pgaUBiQ=
 github.com/charmbracelet/harmonica v0.2.0/go.mod h1:KSri/1RMQOZLbw7AHqgcBycp8pgJnQMYYT8QZRqZ1Ao=
 github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
 github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
-github.com/charmbracelet/x/ansi v0.8.0 h1:9GTq3xq9caJW8ZrBTe0LIe2fvfLR/bYXKTx2llXn7xE=
-github.com/charmbracelet/x/ansi v0.8.0/go.mod h1:wdYl/ONOLHLIVmQaxbIYEC/cRKOQyjTkowiI4blgS9Q=
 github.com/charmbracelet/x/ansi v0.9.2 h1:92AGsQmNTRMzuzHEYfCdjQeUzTrgE1vfO5/7fEVoXdY=
 github.com/charmbracelet/x/ansi v0.9.2/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
 github.com/charmbracelet/x/cellbuf v0.0.13 h1:/KBBKHuVRbq1lYx5BzEHBAFBP8VcQzJejZ/IA3iR28k=
 github.com/charmbracelet/x/cellbuf v0.0.13/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
 github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
@@ -43,17 +37,13 @@ github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
-golang.org/x/sync v0.13.0 h1:AauUjRAJ9OSnvULf/ARrrVywoJDy0YS2AwQ98I37610=
-golang.org/x/sync v0.13.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
+golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
 golang.org/x/sync v0.14.0 h1:woo0S4Yywslg6hp4eUFjTVOyKt0RookbpAHG4c1HmhQ=
 golang.org/x/sync v0.14.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.32.0 h1:s77OFDvIQeibCmezSnk/q6iAfkdiQaJi4VzroCFrN20=
-golang.org/x/sys v0.32.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
 golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
-golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
 golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
diff --git a/main.go b/main.go
index 7f6855b..7b7f9d6 100644
--- a/main.go
+++ b/main.go
@@ -4,21 +4,12 @@ import (
 	"flag"
 	"fmt"
 	"log"
-	"strings"
 	"time"
 
 	"github.com/charmbracelet/bubbles/progress"
 	tea "github.com/charmbracelet/bubbletea"
-	"github.com/charmbracelet/lipgloss"
 )
 
-const (
-	padding  = 2
-	maxWidth = 80
-)
-
-var helpStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#626262")).Render
-
 type (
 	model struct {
 		name        string
@@ -52,57 +43,3 @@ func run() error {
 	}
 	return nil
 }
-
-func initialModel(name string, duration time.Duration) model {
-	return model{
-		name:      name,
-		totalTime: duration,
-		progress:  progress.New(progress.WithDefaultGradient()),
-	}
-}
-
-func tickCmd() tea.Cmd {
-	return tea.Tick(time.Second, func(t time.Time) tea.Msg {
-		return TickMsg(t)
-	})
-}
-
-func (m model) Init() tea.Cmd {
-	return tickCmd()
-}
-
-func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	switch msg := msg.(type) {
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "q":
-			return m, tea.Quit
-		}
-	case tea.WindowSizeMsg:
-		m.progress.Width = min(msg.Width-padding*2-4, maxWidth)
-		return m, nil
-	case TickMsg:
-		if m.progress.Percent() == 1.0 {
-			return m, tea.Quit
-		}
-		m.elapsedTime += time.Second
-		cmd := m.progress.SetPercent(float64(m.elapsedTime) / float64(m.totalTime))
-
-		return m, tea.Batch(tickCmd(), cmd)
-
-	case progress.FrameMsg:
-		progressModel, cmd := m.progress.Update(msg)
-		m.progress = progressModel.(progress.Model)
-		return m, cmd
-	}
-	return m, nil
-}
-
-func (m model) View() string {
-	pad := strings.Repeat(" ", padding)
-	return "\n" +
-		pad + m.name + " for " + m.totalTime.String() + "\n\n" +
-		pad + m.elapsedTime.String() + "\n\n" +
-		pad + m.progress.View() + "\n\n" +
-		pad + helpStyle("Press Q to quit")
-}
diff --git a/tui.go b/tui.go
new file mode 100644
index 0000000..d46b2dd
--- /dev/null
+++ b/tui.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"log"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/charmbracelet/bubbles/progress"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+const (
+	padding  = 2
+	maxWidth = 80
+)
+
+var helpStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#626262")).Render
+
+func initialModel(name string, duration time.Duration) model {
+	return model{
+		name:      name,
+		totalTime: duration,
+		progress:  progress.New(progress.WithDefaultGradient()),
+	}
+}
+
+func tickCmd() tea.Cmd {
+	return tea.Tick(time.Second, func(t time.Time) tea.Msg {
+		return TickMsg(t)
+	})
+}
+
+func (m model) Init() tea.Cmd {
+	return tickCmd()
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "q":
+			return m, tea.Quit
+		}
+	case tea.WindowSizeMsg:
+		m.progress.Width = min(msg.Width-padding*2-4, maxWidth)
+		return m, nil
+	case TickMsg:
+		if m.progress.Percent() == 1.0 {
+			cmd := exec.Command("terminal-notifier", "-title", "Timer Complete", "-message", m.name, "-sound", "Crystal")
+			if err := cmd.Run(); err != nil {
+				log.Fatal(err)
+			}
+			return m, tea.Quit
+		}
+		m.elapsedTime += time.Second
+		cmd := m.progress.SetPercent(float64(m.elapsedTime) / float64(m.totalTime))
+
+		return m, tea.Batch(tickCmd(), cmd)
+
+	case progress.FrameMsg:
+		progressModel, cmd := m.progress.Update(msg)
+		m.progress = progressModel.(progress.Model)
+		return m, cmd
+	}
+	return m, nil
+}
+
+func (m model) View() string {
+	pad := strings.Repeat(" ", padding)
+	return "\n" +
+		pad + m.name + " for " + m.totalTime.String() + "\n\n" +
+		pad + m.elapsedTime.String() + "\n\n" +
+		pad + m.progress.View() + "\n\n" +
+		pad + helpStyle("Press Q to quit")
+}