diff --git a/README.md b/README.md
index 1f3c63b..c3ac9e4 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ AUTH_TOKEN=bearer-token-here # Put your token generated from the server .env fil
 		Info: "This is a camera app",
 		Pub:  "matu6968",
 	}
-	newApp, err := c.UploadApp(metadata, "./index.js")
+	newApp, err := client.UploadApp(metadata, "./index.js", "123456789011") // custom app id is optional
 	if err != nil {
 		log.Fatal("Failed to upload app:", err)
 	}
diff --git a/webdesk-appmarket-golang.go b/webdesk-appmarket-golang.go
index b39b200..2c6793a 100644
--- a/webdesk-appmarket-golang.go
+++ b/webdesk-appmarket-golang.go
@@ -33,6 +33,12 @@ type AppMetadata struct {
 	Pub  string `json:"pub"`
 }
 
+// Extended metadata struct to include optional AppID
+type uploadMetadata struct {
+	AppMetadata
+	AppID string `json:"appid,omitempty"`
+}
+
 // NewClient creates a new AppStore client
 func NewClient(baseURL, authToken string) *AppStoreClient {
 	return &AppStoreClient{
@@ -62,14 +68,20 @@ func (c *AppStoreClient) GetApps() ([]App, error) {
 	return apps, nil
 }
 
-// UploadApp uploads a new app to the store
-func (c *AppStoreClient) UploadApp(metadata AppMetadata, filePath string) (*App, error) {
+// UploadApp uploads a new app to the store with an optional custom app ID
+func (c *AppStoreClient) UploadApp(metadata AppMetadata, filePath string, customAppID string) (*App, error) {
+	// Create extended metadata with optional AppID
+	extendedMetadata := uploadMetadata{
+		AppMetadata: metadata,
+		AppID:       customAppID, // Will be omitted from JSON if empty
+	}
+
 	// Create multipart form
 	body := &bytes.Buffer{}
 	writer := multipart.NewWriter(body)
 
 	// Add metadata
-	metadataBytes, err := json.Marshal(metadata)
+	metadataBytes, err := json.Marshal(extendedMetadata)
 	if err != nil {
 		return nil, err
 	}
@@ -124,6 +136,11 @@ func (c *AppStoreClient) UploadApp(metadata AppMetadata, filePath string) (*App,
 	return &newApp, nil
 }
 
+// Backwards compatibility wrapper
+func (c *AppStoreClient) UploadAppSimple(metadata AppMetadata, filePath string) (*App, error) {
+	return c.UploadApp(metadata, filePath, "")
+}
+
 // EditApp updates an existing app
 func (c *AppStoreClient) EditApp(appID string, metadata AppMetadata, filePath string) error {
 	body := &bytes.Buffer{}