Product design question

You are a new PM at Facebook. Design an app to help people save money.

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Product design leveraging platform-specific data (social graph, marketplace) for a personal finance use case.

Define the user: someone who wants to save money but struggles with motivation and lacks visibility into peer spending norms.
Identify the pain point: generic budgeting apps lack the social accountability and marketplace deal-finding that Facebook's ecosystem could provide.
Prioritize a social-accountability angle over a generic budgeting tracker, since that's Facebook's unique advantage over Mint or YNAB.
Design a feature: savings challenges with friends (small group goals), plus Marketplace deal alerts tied to a user's actual spending categories.
Address privacy carefully, since financial data is highly sensitive and requires explicit opt-in and strong data protection.
Define success metrics: savings goal completion rate and weekly active participation in group challenges.

Leverages the social graph for accountability, a genuine differentiator over standalone budgeting apps.
Connects Marketplace's existing deal inventory to a user's spending categories, adding real utility beyond tracking.
Gives an illustrative metric, e.g. 30% higher goal completion rate for users in a group challenge versus solo, marked as an assumption.
Flags privacy as a first-class constraint, not an afterthought, given the sensitivity of financial data.

Building a generic budgeting tracker that ignores Facebook's actual social and marketplace advantages.
Underestimating the privacy and trust bar required to handle financial data.

Chapters of the AI PM course that teach what this question tests.