Write an Android application

Native App developer (Android & Java) 1. Already our developer developed this Pooja store app from below predefined template and deployed into Go Daddy [login to view URL] Deployed app, in Google Play store link: [login to view URL] However, later total business plan was changed, so what we would like to have is, from the scratch we have to develop new Pooja store, pandit booking app or will modify the existed app, either way? High level prototype: R1: Sellers (shop owners can upload their Pooja Item into our Pooja store app directly, in-between just approve or deny is required from our side R2: Book purohits for any date and time just like appointment, If we can any booking, Just we need to push all our registered purohits or any other logic fine R3: Online payment integration for our vendors ([login to view URL] and [login to view URL]) and [login to view URL] customers’ purchasers App should run on its own, seller can upload, customer can buy, book purohits [login to view URL], R2, R3, if u can build exist Pooja app also fine or B. new native app also okay Either way fine C. If already, u have predefined template to manage both sellers & customers app also fine for me Exist app link: [login to view URL] What my intention is we do not want to interact to the system, It should run automatically All common things like orders we need to track and push notifications, share app link and …..etc Pls , get connect to me if u r interested to above