I need Ready Video Calling Apps android

Hi, Greetings! Let's join hands for long term relationships with the best Technical Team. Concerning your requirement, I have worked on similar projects and features of the app to what you are looking for, and I am confident I can exceed your expectations. Skills: PHP & .NET Frameworks, MySQL, REST API, Javascript, Jquery, Advanced Javascript (Angular, React JS), AWS cloud, MongoDB, Express JS, Flutter, Mobile application development (Android/iOS), full-stack development, frontend, and backend development, PWA, Siberian CMS, IoT applications. Our aim is your success. We are a software development company that works with small to medium size companies and help them by providing software solutions taking end to end responsibility of a product/application. This helps the customer to save time and focus on the actual business model. Our existing solutions/services help many customers to increase business/ product usage. I have below queries: 1. What is your bread and butter from this project? 2. Do you have any documentation feature list or ref app? 3. What are your thoughts on UI/UX? 4. What will be the plan to launch a new app? 5. When you are looking to start the development? Awaiting a positive response :) Regards, Akash