Currently we have very different upload detail and add-category screens
between Android and iOS versions of the Wikimedia Commons uploader app.
I've put descriptions and quick comparative videos on
mediawiki.org:
https://www.mediawiki.org/wiki/Apps/Commons/Categories
Impressions and ideas welcome!
(Y'all can try the Android version with categorization from Google Play --
the iOS version in the App Store doesn't yet have categories but you can
try the older version to get a feel for the layout and the first data entry
screen. For those on the beta group, there'll be a push via TestFlight
later today.)
-- brion