diff --git a/README.md b/README.md
index 86ba4f1..7df55e9 100644
--- a/README.md
+++ b/README.md
@@ -12,4 +12,6 @@ TODO
   - [x] 保存历史
   - [x] 自动接收
   - [ ] 传输加密
-- [ ] 单例模式
\ No newline at end of file
+- [x] 单例模式
+- [ ] icon
+- [x] 通知
\ No newline at end of file
diff --git a/internal/transfer/server.go b/internal/transfer/server.go
index 75ea198..5801b34 100644
--- a/internal/transfer/server.go
+++ b/internal/transfer/server.go
@@ -15,6 +15,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+	"github.com/wailsapp/wails/v3/pkg/services/notifications"
 )
 
 // handleAsk 处理接收文件请求
@@ -48,6 +49,12 @@ func (s *Service) handleAsk(c *gin.Context) {
 			Accepted: true,
 			SavePath: s.config.GetSavePath(),
 		}
+	} else {
+		_ = s.notifier.SendNotification(notifications.NotificationOptions{
+			ID:    uuid.New().String(),
+			Title: "File Transfer Request",
+			Body:  fmt.Sprintf("%s wants to transfer %s", task.Sender, task.FileName),
+		})
 	}
 
 	// 等待用户决策或发送端放弃
diff --git a/internal/transfer/service.go b/internal/transfer/service.go
index e1ca57a..6f54d27 100644
--- a/internal/transfer/service.go
+++ b/internal/transfer/service.go
@@ -10,12 +10,14 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/wailsapp/wails/v3/pkg/application"
+	"github.com/wailsapp/wails/v3/pkg/services/notifications"
 )
 
 type Service struct {
-	config *config.Config
-	app    *application.App
-	port   int
+	config   *config.Config
+	notifier *notifications.NotificationService
+	app      *application.App
+	port     int
 
 	// pendingRequests 存储等待用户确认的通道
 	// Key: TransferID, Value: *Transfer
@@ -28,11 +30,12 @@ type Service struct {
 	cancelMap sync.Map
 }
 
-func NewService(config *config.Config, app *application.App, port int, discoveryService *discovery.Service) *Service {
+func NewService(config *config.Config, app *application.App, notifier *notifications.NotificationService, port int, discoveryService *discovery.Service) *Service {
 	gin.SetMode(gin.ReleaseMode)
 
 	return &Service{
 		app:              app,
+		notifier:         notifier,
 		port:             port,
 		discoveryService: discoveryService,
 		config:           config,
diff --git a/main.go b/main.go
index 112a04a..a6c4e56 100644
--- a/main.go
+++ b/main.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/wailsapp/wails/v3/pkg/application"
 	"github.com/wailsapp/wails/v3/pkg/events"
+	"github.com/wailsapp/wails/v3/pkg/services/notifications"
 )
 
 //go:embed all:frontend/dist
@@ -28,6 +29,9 @@ func main() {
 		Assets: application.AssetOptions{
 			Handler: application.AssetFileServerFS(assets),
 		},
+		SingleInstance: &application.SingleInstanceOptions{
+			UniqueID: "com.nite07.mesh-drop",
+		},
 	})
 
 	// 创建保存路径
@@ -36,7 +40,16 @@ func main() {
 		slog.Error("Failed to create save path", "path", conf.SavePath, "error", err)
 	}
 
-	// 文件传输端口
+	// 通知
+	notifier := notifications.New()
+	authorized, err := notifier.RequestNotificationAuthorization()
+	if err != nil {
+		slog.Error("Failed to request notification authorization", "error", err)
+	}
+	if !authorized {
+		slog.Error("Notification authorization not granted")
+	}
+
 	port := 9989
 
 	// 初始化发现服务
@@ -44,7 +57,7 @@ func main() {
 	discoveryService.Start()
 
 	// 初始化传输服务
-	transferService := transfer.NewService(conf, app, port, discoveryService)
+	transferService := transfer.NewService(conf, app, notifier, port, discoveryService)
 	transferService.Start()
 	// 加载传输历史
 	if conf.GetSaveHistory() {
@@ -56,6 +69,7 @@ func main() {
 	app.RegisterService(application.NewService(discoveryService))
 	app.RegisterService(application.NewService(transferService))
 	app.RegisterService(application.NewService(conf))
+	app.RegisterService(application.NewService(notifier))
 
 	window := app.Window.NewWithOptions(application.WebviewWindowOptions{
 		Title:          "mesh drop",