Video calls have become an integral part of our lives, but creating a seamless video calling application can be challenging. To simplify the process, 100ms has developed an SDK with fully equipped, configurable, and customizable Prebuilt UI support for Flutter applications. The HMSRoomKit package offers a single powerful widget for end-to-end meeting flow, handling everything from initiating calls to crafting user interfaces. By following the steps outlined in this article, developers can easily integrate video calling functionality into their Flutter apps and customize it further using the 100ms dashboard.