Data sovereignty means continuing, revocable control over data about yourself. A measurement of 5,791 current agreements, 861,316 policy snapshots across 22 years, and 19 before-and-after GDPR pairs shows the mobile-app EULA is engineered to make that control impossible: postgraduate prose, terms that can be rewritten silently, no version to cite, and no way to say no.
In 2013 a draft paper set out to measure the mobile-app agreements nobody reads, then stalled with its statistics left as 'XX' placeholders. This finishes it. A bibliometric analysis of 92 real mobile-app EULAs finds a postgraduate reading level, ~11 minutes each, and a structural trap: three-quarters can be rewritten at any time and bind you by 'continued use,' yet only 3% carry a version number. The agreements are written to be agreed to, not read — with the fine print, verbatim, to prove it.