Crash triage with Android vitals

Android vitals is watching two numbers

Android vitals, inside the Play Console, tracks how your released app behaves on real user devices — the two headline metrics are crash rate (the app terminates unexpectedly) and ANR rate (Application Not Responding — the main thread is blocked long enough that Android itself offers to force-close the app, roughly 5 seconds of no response to input). Both have Google-enforced bad-behavior thresholds: cross them, and your app can lose visibility in the Play Store — demoted in search and recommendations, sometimes with a warning shown to installers. This isn't just a dashboard for your own curiosity; it's tied to your app's actual reach.

You've seen the ANR-causing failure mode before, back in module 19: block the main thread with something slow — a heavy computation, a synchronous disk read — and Android eventually gives up waiting.