You can find the official download links on the ownCloud Download Page or directly through your server's web interface.

Installing the Desktop App - ownCloud Documentation Overview

The is a client-side application designed to connect to an ownCloud server , enabling users to synchronize, access, and share files across various devices while maintaining full digital sovereignty. Unlike consumer-grade services, ownCloud allows you to host your own data on-premises or in a private cloud, providing enhanced security and privacy. Where to Download the ownCloud App