The first day of Design Sprint is all about understanding , what problem we want to solve. This is an opportunity for all members of the team to share all  they know including experts around the topic  and define the objectives of prototype.

On the first day we analyse the available data analytics, define personas (user profiles) , will create a user or customer journey, quickly analyse the competition (benchmarking) and will evaluate the qualities and weaknesses of the current existing app (if any). At the end of the day, a strategy will be defined that will serve as a guiding thread for the next steps.