- A visitor can use multiple devices and browsers (from different locations) and may visit multiple wikis.
- Only wikis with more than 1,000 unique devices in that period got logged (as of November 2016).
- Counts are based on a browser cookie (can be cleared by user).
- Data source are Analytics Datasets (Wikimedia).
- There might be an overlap between mobile versions of Wikipedia and foreign Wikimedia foundation wikis, similar to Page Views (see below).
- There seems to be an overlap between mobile versions of Wikipedia and foreign Wikimedia foundation wikis in the used data source (e.g. for "tr.m", as only "tr.m.m" is distinct and there is no "tr.m.z"; and see "il.m").
For more information, please also see FAQ