You're the PM for a calendar app. How would you design metrics for it?

Focus on identifying key user interactions and outcomes that indicate the app's success. Consider metrics that reflect user engagement, such as daily active users (DAU), session length, and frequency of event creation. Think about retention metrics, like the percentage of users returning after the first week or month. Additionally, explore how to measure user satisfaction through Net Promoter Score (NPS) or user feedback ratings. Lastly, consider metrics that assess the effectiveness of features, such as the usage rate of reminders or shared calendars.