"Crash-free" rate isn't enough for mobile... other metrics to watch according to Google

“99.9% crash-free” says almost nothing about:

• Slow screens
• UI jank
• Failed network requests that retry silently
• Flows users abandon because something felt broken

A lot of the worst mobile issues never show up as crashes. Was digging into Android Vitals for Google's POV on this - they emphasize things like:

• ANRs
• Slow rendering
• Excessive wakeups

https://developer.android.com/topic/performance/vitals

Feels like crash-free rate is one of the least representative metrics of real UX, even though it's the one everyone pays attention to. Food for thought.