Daily iOS
Performance and debugging

Adopting and running app monitoring (APM)

If you were introducing monitoring like Sentry or Firebase Crashlytics to a team for the first time, which metrics would you define?

How would an interviewer hear this answer? You'll see whether they'd move on, dig in, or say no, and which sentences would trip you up. Your score doesn't change.
See the short answer

The core metrics are crash-free user and session rates, hang and ANR rates, cold launch time p50 and p90, TTI for key screens, and network failure rate, all defined as rates and distributions that compare across releases regardless of user count.

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