What is an app's crash-free rate?

Crash-free rate expresses stability as the percentage of sessions or users that experienced no crash during a period. Always check which denominator a dashboard uses before comparing numbers from different tools.

The overall percentage can look healthy while one release is failing badly. So, break stability down by app version, operating system, and crash signature, then fix issues by affected users and severity rather than by whichever stack trace happens to be newest.

Kickstart pulls App Store Connect crash data, shows crash-free rate by version and top signatures, and lets you turn important issues into tasks before release.