How would you measure the success of FaceTime?

To measure the success of FaceTime, I would first clarify its primary goals, such as user engagement, retention, and revenue generation (if applicable).

Then, I'd map out the user journey to identify key interaction points.

Key metrics to consider would include:

• Engagement Metrics: Daily Active Users (DAU), Monthly Active Users (MAU), average call duration, number of calls per user, feature adoption rates (e.g., Group FaceTime, Memoji).
• Retention Metrics: User churn rate, cohort retention over time.
• Quality Metrics: Call success rate, dropped call rate, audio/video quality scores (user-reported or system-level).
• Growth Metrics: New user acquisition, referral rates.
• Monetization Metrics (if applicable): Revenue from premium features or associated services.

I would prioritize these based on the current stage of FaceTime (e.g., focusing on engagement and quality for a mature product, or acquisition and engagement for a new feature).