Door Knock Sounds is a free lifestyle app developed by Robino Apps for Android devices. As the name suggests, it is a soundboard app that features various door knock sounds. With just a press of a button, users can listen to different knock sounds that can be used for fun or to prank their friends.

The app also allows users to save the sounds to a local folder or use them as notification or ringtone sounds. The loop button at the top of the app enables users to loop the sounds for a more immersive experience. The app is simple and easy to use, making it an enjoyable addition to anyone's soundboard collection.

Overall, Door Knock Sounds is a fun and straightforward app that provides users with a variety of door knock sounds to choose from. It is perfect for anyone who wants to have some fun or play harmless pranks on their friends.