If you already have APEX 19.x or 21.x and simply need a newer version, your will be used for an upgrade, not a fresh install.
Oracle does not distribute APEX through third-party repositories like GitHub (except for sample code). You must obtain the software from the or Oracle Software Delivery Cloud . oracle apex download
As of Oracle’s 2018 policy change, APEX is free to use on any edition of Oracle Database — even Standard Edition One — without paying the Oracle WebLogic Server or Enterprise Edition license. This massively accelerated adoption. If you already have APEX 19
The story begins in 1999 at Oracle Corporation. A developer named was working on a tedious internal project: building HTML reports from an Oracle database using CGI (Common Gateway Interface) scripts. Frustrated by the repetitive work, he created a small framework in PL/SQL that could generate web pages directly from database procedures. As of Oracle’s 2018 policy change, APEX is