The Sangsaeng Delivery merchant app is a food delivery service using smartphones.
After receiving an order through the app, a delivery driver uses the order information and location to pick up the item from the store or delivery location, then drives to the destination and delivers it.
The app uses voice notifications for order-related information.
This feature is not a simple sound effect; it provides essential order guidance for business purposes. Special audio playback permissions are required to ensure reliable operation.