Requirements

Apollon is a web application. Any current browser is enough.

Browser	Minimum
Chrome / Edge	last 2 versions
Firefox	last 2 versions
Safari	16+

Diagrams persist in your browser's localStorage (or on the standalone server if you're connected). Real-time collaboration uses WebSockets — corporate proxies that strip Upgrade headers will downgrade to local-only editing.

On phones and tablets, open the same URL in the mobile browser — there is no app-store download.