what is the marketing communication process for developing a new application ?

( note : The product is going to be in the form of a mobile application on different platforms like Android and iOS. It allows anyone who needs to talk to a specialist to log in the app, writes, records voice or video to explain his/her case and then the app will connect him/her with the specialist from any place in the world taking into consideration the preferred language by the applicant)

(note: this application is to help people who have a psychology issue cause of Covid-19 pandemic )