Choose a Consumer Health App You Admire and Lay Out a Plan to Grow It
Company: 23andMe
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
Pick the health app you like best, explain what makes it work for its users, and lay out how you would grow it.
```hint Start from the habit loop
Before suggesting ideas, describe what brings a user back to the app each week, then look for the stage where most new users fall out of that loop.
```
### Clarifying Questions
- Does any consumer health product count (fitness, nutrition, sleep, mental health, condition management), or should I pick one built around personal health data?
- Should "grow" mean more new users, more engaged existing users, or more paying subscribers?
- Am I growing the app as its own product manager with its current team, or advising it from outside?
### What a Strong Answer Covers
- A deliberate choice of app, with a crisp explanation of its core loop and why users keep coming back
- One growth goal and one target segment, chosen from where the funnel is weakest
- Prioritized growth ideas aimed at that segment's pain points, not a feature wish list
- A north-star metric with guardrails that fit a health product: privacy, physical safety and user trust
- An experiment that would validate the top idea, including how to read its result
### Follow-up Questions
- How would your plan change if users were worried about who can see their health or location data?
- Your experiment lifts sign-ups but four-week retention falls. What do you conclude, and what do you do next?
- How would you adapt this growth approach to a health product most customers buy only once, such as an at-home test kit?
Overview: A product strategy prompt that asks you to pick a consumer health app you admire, explain why it works for its users, and lay out how you would grow it. It tests core-loop analysis, choosing a growth goal and segment, prioritizing ideas, health-aware success metrics and experiment design.