Value Metric
Daily Active Users (DAU)
Daily Active Users (DAU) is the number of unique users who engage with your product on a given day.
What is Daily Active Users (DAU)?
Daily Active Users counts the unique people who take a meaningful action in your product on a single day. The word that matters is "active": DAU is only useful if "active" is defined as a genuine, value-reflecting action rather than merely opening the app.
DAU is a headline engagement metric, most meaningful for products intended to be used frequently. For products used weekly or monthly, WAU or MAU are more appropriate primary measures.
How to calculate it
DAU = Count of Unique Users Performing a Qualifying Action in a Day
- Qualifying Action
- The action that defines "active" (e.g. created, sent, viewed)
Worked example
If 8,500 unique users perform a qualifying action on Tuesday, DAU for Tuesday is 8,500.
What good looks like
- Fit the usage cadenceFrequency-dependent
DAU is a meaningful headline only for daily-use products. For less frequent products, lead with WAU or MAU and use DAU as a supporting view.
Why it matters
DAU is the pulse of a frequently-used product: it reflects habit, stickiness, and the reach of daily value. Tracked alongside MAU it reveals engagement depth, and sudden movements are an early warning of problems or the payoff of an improvement. Its main pitfall is a weak definition of "active," which can flatter the number.
How to improve Daily Active Users (DAU)
Build habit loops
Give users clear, recurring reasons to return — triggers, digests, and workflows that fit into their day.
Deepen daily value
Interview your most engaged users to learn what pulls them back, then make that value more central and discoverable.
Frequently asked questions
How should you define an "active" user?
Define active as performing a qualifying action that reflects real value — not just launching the app. The exact action depends on your product, but it should correlate with retention. A weak definition inflates DAU and hides disengagement.
Is DAU the right metric for every product?
No. DAU only makes sense for products meant to be used daily. For weekly or monthly use cases, WAU or MAU are better primary metrics, with DAU as a secondary signal.