Upload one PDF per group outlining how you would extend your system to collect and use collected (user-related) data and interactions to improve your "hearable" system.

This should minimally be in the form of extending your system to allow validating/comparing designs or behaviour and learning about your users, or even better by making your system learn from and adapt to (individual) preferences learned from the user’s behaviour.

Do this by 1) sketching goals, activities and tasks in a user story map (E.g. https://www.lucidchart.com or  https://www.draw.io/ or https://storiesonboard.com/) as hypotheses that can be validated 2) include in the PDF a working link to a functional executable prototype. Remember to update and include also 3) your lean business canvas for the app in the PDF.