Formula
DAU / MAU x 100
How to measure
Divide the daily active user count by the monthly active user count for the same day, then average across the period if tracking a trend.
Why track it
A rising ratio shows users are returning more frequently within the month, a strong sign the product is becoming habitual.
Example
A tool with 100,000 DAU and 400,000 MAU has a 25% stickiness ratio.