ANR stands for ‘App Not Responsive.’ It is reported from the app measurement suites, and essentially indicates that an app has stuck or frozen during a user interaction. This is a negative ASO ranking signal for both iOS and Android Apps. It indicates that there is a bug, dependency or code problem that needs to fixed. ANR is more like a time-out than a crash, because sometimes the non-responsive app is stuck open, instead of fully crashing and closing.

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