Need an Expert in Android and Desktop Application developer.

Requrements: -------------------------- Need Android and Desktop application that makes video conference with Registered users. 1. one application for Master a. Master can register users. b. Only Master will Make live video. Users only can see and listen. c. Need video time limit. d. For desktop application auto detect Camera devices. e. No option for share application. f. To get this application Need to registered with us. g. This Application for teachers who will teach their house due to covid-19. So each registered teachers can select two subjects. 2. one Application for Students/users a. Users can not register. Master can register users. b. Users can not make video. There will another option to contact with teacher(They can make live chat during streamin video ). c. Notification alert for users.