Weekly Active Users (WAU)

Weekly Active Users, often abbreviated as WAU, is a user accounting metric that counts the number of unique users who have been active within a specific seven-day period (0-6 days from a given date). This metric is used to measure user engagement on a weekly basis.


A user is considered "active" based on a company-wide definition of a daily active user. By default, any Statsig SDK event/request (like check_gate, get_config, log_event) associated with a user will automatically designate that user as being active for that day. This set of events can be customized based on the specific needs of the company.


  • If a user logs in and interacts with your app on Monday and then again on Friday within the same week, they are counted as a weekly active user.

  • This metric includes users who were active on each of the seven days, and users who have only been active on a single day within the week.

Notation and Conventions

  • The first day a new user was active is denoted as Day Zero (D0), and the subsequent days as D1, D2, D3...etc.

  • A user with a single session that spans midnight with qualifying events at 11:59p and 12:01a will qualify a user as being a daily active user on both days, and thus also a weekly active user.

The Importance of WAU

Understanding your WAU can inform your growth strategy and tell you whether your product is growing, stagnant, or shrinking. It can also help you understand the relative engagement of your customer base and usage seasonality. For example, do daily active users (DAU) become WAU or do WAU become monthly active users (MAU) at certain times of the year?


The definition of a weekly active user can be customized within the Statsig Console and can include or exclude a set of Statsig and custom events. This allows for a more accurate representation of user engagement based on the unique characteristics of your product or service.

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