Apple returns countryOrRegion only for installs it attributed. Measured 2026-08-20:
7,850 of 7,906 paid installs carried a country, against 14 of 66,200 organic — so
89% of users had no geography and any geo view was a paid-only view.

Locale.current.region on iOS 16+, regionCode below it, which also covers the older
devices that cannot provide an AppTransaction.

It is the device's own setting, not the App Store storefront, and disagrees for
someone travelling or living abroad. The backend keeps it in its own column rather
than merging it into Apple's country, so a weaker signal never overwrites a stronger.

No API change.