Glossary
What is Daily Active Users (DAU) ?
DAU is the number of unique users who open and engage with an app on any given day, a primary metric for measuring app health and engagement.

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Daily Active Users (DAU): Definition & Meaning | Segwise Glossary
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Overview
DAU is the number of unique users who open and engage with an app on any given day, a primary metric for measuring app health and engagement.
Daily Active Users (DAU) : Full Definition Daily Active Users (DAU) counts the number of unique users who open and interact with an app within a 24-hour period.
It's the most fundamental engagement health metric for mobile apps, more important than total installs because it reflects actual ongoing usage rather than historical downloads.
DAU is typically presented alongside MAU (Monthly Active Users) and their ratio (DAU/MAU), called the stickiness ratio, which measures how frequently monthly users engage daily.
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