AppVault
Hidden Bar
Tidy up your Mac menu bar. Hide icons you don't need to see all the time.
Hidden Bar is a tiny, free, open-source utility that lets you collapse menu bar icons behind a chevron — just like the Windows system tray. Drag the separator to choose which icons are always visible and which are tucked away. It's the simplest solution to macOS menu bar clutter. No configuration panels, no preferences window — just drag and done.