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Product sensewarm-up
Design an app that makes splitting bills among roommates painless.
How to approach it
Ask which bills cause the most friction: rent and utilities that repeat, or one-off shared purchases.
How a strong answer opens
“I'd like to know which bills cause the most friction: rent and utilities that repeat every month, or one-off shared purchases. They need different designs.”
Outline of a strong answer
Try answering out loud for a few minutes before you open this.
- Clarify household size and types of shared costs
- Pain points: tracking who paid, awkward reminders, uneven splits
- Ideas: recurring bills, auto-split rules, gentle reminders, settle-up
- Prioritize recurring bills with auto reminders
- Measure on-time settle rate and monthly active households
Where this question usually goes wrong
Building a general expense splitter and missing that the awkward part is reminding a roommate to pay, not doing the math.
Learn the method
Generate solutions worth discussing in Module 1, Product sense and design.
The full kit has worked answers in full, start to finish, for every round type. $129 once.