The analytics team would like to announce that we have a new visualization
for Unique Devices data. As you know Unique Devices  is our best proxy
to calculate Unique Users. We would like to reiterate that the data is
available in a public API that anyone can access . We calculate Uniques
daily and monthly.
See, for example, "Daily Unique Devices" for Spanish Wikipedia versus
FYI that dashboard would not work on IE, only on Edge.