diff --git a/hrp/internal/code/code.go b/hrp/internal/code/code.go
index 3479c8b6..71f9226c 100644
--- a/hrp/internal/code/code.go
+++ b/hrp/internal/code/code.go
@@ -68,6 +68,7 @@ var (
 // UI automation related: [70, 80)
 var (
 	MobileUIDriverError             = errors.New("mobile UI driver error")                // 70
+	MobileUILaunchAppError          = errors.New("mobile UI launch app error")            // 71
 	MobileUIValidationError         = errors.New("mobile UI validation error")            // 75
 	MobileUIAppNotInForegroundError = errors.New("mobile UI app not in foreground error") // 76
 )
@@ -125,6 +126,7 @@ var errorsMap = map[error]int{
 
 	// UI automation related
 	MobileUIDriverError:             70,
+	MobileUILaunchAppError:          71,
 	MobileUIValidationError:         75,
 	MobileUIAppNotInForegroundError: 76,
 
diff --git a/hrp/pkg/uixt/android_adb_driver.go b/hrp/pkg/uixt/android_adb_driver.go
index 68f8c28b..388c444e 100644
--- a/hrp/pkg/uixt/android_adb_driver.go
+++ b/hrp/pkg/uixt/android_adb_driver.go
@@ -160,10 +160,12 @@ func (ad *adbDriver) AppLaunch(packageName string) (err error) {
 		"monkey", "-p", packageName, "-c", "android.intent.category.LAUNCHER", "1",
 	)
 	if err != nil {
-		return err
+		return errors.Wrap(code.MobileUILaunchAppError,
+			fmt.Sprintf("monkey launch failed: %v", err))
 	}
 	if strings.Contains(sOutput, "monkey aborted") {
-		return fmt.Errorf("app launch: %s", strings.TrimSpace(sOutput))
+		return errors.Wrap(code.MobileUILaunchAppError,
+			fmt.Sprintf("monkey aborted: %s", strings.TrimSpace(sOutput)))
 	}
 	ad.lastLaunchedPackageName = packageName
 	return nil
diff --git a/hrp/pkg/uixt/ios_driver.go b/hrp/pkg/uixt/ios_driver.go
index 33bbe0ed..830d78cc 100644
--- a/hrp/pkg/uixt/ios_driver.go
+++ b/hrp/pkg/uixt/ios_driver.go
@@ -308,17 +308,23 @@ func (wd *wdaDriver) AppLaunch(bundleId string) (err error) {
 	data := make(map[string]interface{})
 	data["bundleId"] = bundleId
 	_, err = wd.httpPOST(data, "/session", wd.sessionId, "/wda/apps/launch")
-	if err == nil {
-		wd.lastLaunchedPackageName = bundleId
+	if err != nil {
+		return errors.Wrap(code.MobileUILaunchAppError,
+			fmt.Sprintf("wda launch failed: %v", err))
 	}
-	return
+	wd.lastLaunchedPackageName = bundleId
+	return nil
 }
 
 func (wd *wdaDriver) AppLaunchUnattached(bundleId string) (err error) {
 	// [[FBRoute POST:@"/wda/apps/launchUnattached"].withoutSession respondWithTarget:self action:@selector(handleLaunchUnattachedApp:)]
 	data := map[string]interface{}{"bundleId": bundleId}
 	_, err = wd.httpPOST(data, "/wda/apps/launchUnattached")
-	return
+	if err != nil {
+		return errors.Wrap(code.MobileUILaunchAppError,
+			fmt.Sprintf("wda launchUnattached failed: %v", err))
+	}
+	return nil
 }
 
 func (wd *wdaDriver) AppTerminate(bundleId string) (successful bool, err error) {