These numbers come from counting requests, nothing more. When your watch asks for a reading, our relay notes that a request happened and the country the connection arrived from. Readings pass straight through to your watch and are never stored.
Country level, from anonymous connection data. Drag to spin, scroll to zoom, tap a dot for its count.
36 countries in the list, scroll to see them all.
Note from the developer:All these data are counted from anonymous, aggregated relay requests. No glucose values or identities are stored. Your privacy comes first: we do everything possible to keep them that way.