Hello!
We will make the development as demanded by you.
But first we would like to know detailed description about your project work to create the Project timeline and Flow chart.
We have 5 + year experience in android app development using Android Studio 3.1.2 with MVVP Structure.
Following is the general Layout of the project we prefer.
1. Material Design for Good Looking and Advance Design Application.
2. Develop the Application with the help of Restful Api using Retrofit or Volley Library.
3. Use firebase for real-time Chat, Notification, Deep Linking, Crash Report, and User Analytic.
4. Use Google Map API for Live tracking on Google Map, Place API for Address and etc.
5. Integrate all payment Gateway According to Your Requirement.
6. Delivery of product After Testing of All Application using Test and Drive Technique.