A native window around the same Otto you already use at runotto.app — same login, same everything, just its own app in your Dock instead of a browser tab. Version 1.0.0.
First time opening it
macOS will say Otto is from an unidentified developer — that's expected, the app isn't signed with a paid Apple developer certificate yet. Right-click (or Control-click) the Otto app in your Applications folder, choose Open, then click Open again in the popup. You only need to do this once.
Not on a Mac? Use Otto in your browser instead — everything works there too.