The requirement is to build an Android app, the design files are in InVision and Sketch formats. This is the prototype: [url removed, login to view]
For the backend integration, you will use Backendless. On the login part, you can dismiss Google and Twitter and just stick to Facebook.
Please take a close look at all screens and let me know your questions as well as your estimate in cost and time to build this app.
You will commit your code and daily progress on a GitHub repository owned by me.