Crash Free Sessions
Crash Free Sessions is an analytics and metrics concept for tracking percentage of sessions without fatal crashes so teams measure product health with confidence.
This definition sits in our Analytics & Metrics glossary cluster alongside Tap Heatmap and Scroll Depth Mobile.
Definition of Crash Free Sessions
Crash Free Sessions in practical product analytics means tracking percentage of sessions without fatal crashes. For lean teams, results are strongest when each review tracks crash-free sessions percentage week over week instead of dashboard theater. A recurring failure mode is celebrating crash-free users while key flows still fail silently, which leads to wrong decisions and wasted experiments.
Why Crash Free Sessions matters
- It gives a concrete lever to improve crash-free sessions percentage week over week with limited analytics bandwidth.
- It connects instrumentation, reporting, and experiments to actionable decisions.
- It reduces guesswork by making metric definitions and ownership explicit.
- It prevents celebrating crash-free users while key flows still fail silently from distorting what the team optimizes.
Example: Crash Free Sessions for a mobile product team
A product squad applies Crash Free Sessions by focusing on crash-free sessions recover after null guard patch in checkout. After the next release cycle, they review movement in crash-free sessions percentage week over week and adjust roadmap priorities.
Related terms for Crash Free Sessions
Terms that reference Crash Free Sessions
Common questions about Crash Free Sessions
How should a small team adopt Crash Free Sessions without overengineering?
Start with one KPI tied to crash-free sessions percentage week over week and instrument Crash Free Sessions for that journey only. Ship, review weekly, and expand taxonomy when definitions are stable.
What is the most common mistake with Crash Free Sessions?
The common trap is celebrating crash-free users while key flows still fail silently. When this happens, dashboards look busy but decisions still rely on gut feel.
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