Change the Time Range
When you change the date range, Sentry recalculates the values. Sentry doesn't provide the average value of the daily crash-free users or daily crash-free sessions, but the actual value of those metrics calculated for the selected time period. The number can significantly change based on the selected time range.
For example, if you selected the 24-hour time range, have seven users that are using your application for seven days, and each day one of them experiences a crash. The Release Index page will show you that every day there were 85.7% crash-free users on the release.
By contrast, let's say you selected the seven-day time range, have seven users, and each day a different user experiences a crash. By the end of the week, the Release Index page will show you the project had 0% crash-free users.