Audio Streaming App development

I need a developer to Fully analyze how this open-source code [login to view URL] [login to view URL] Or this clone. [login to view URL] [login to view URL] will be helpful for me in building my audio streaming app. in terms of: what is their mobile apps lang they are using? shall we build our own native ones? how many team members will be needed to build our apps in native if their mobile apps are hybrid? how we will convert their platform and modify it for audio and for our app design and features? shall we use 3rd party audio streaming services like [login to view URL] and [login to view URL] how many team members will be needed to modify their backend? You will help me then in communicating with the app development company that I will select from a list so that they dont cheat on me:) i have finished the app design, its features should be similar to [login to view URL] [login to view URL] [login to view URL] [login to view URL] here is a google sheet of my app features,it should be in web, native android kotlin, native ios swift [login to view URL] My app design links: [login to view URL] [login to view URL] [login to view URL] please download the recommended tech stack for the tech and security points and are they present in this YouTube php code