Getting started
Two steps. Then Fluid opens on Today.
Install it, sign in with Apple. There is nothing to configure; the Mac extras are opt-in whenever you want them.
Download and install
Download Fluid for Mac. Open the .dmg and drag Fluid into Applications. The first time you open it, macOS may ask you to confirm.

Sign in with Apple
Fluid opens on a single button: Continue with Apple. It asks for your name and email only, and Hide My Email works. Your session stays in the Keychain, so you sign in once.
Sign in with the same Apple ID on your iPad or iPhone and your tasks, notes, events and settings are already there.

That's it
Fluid opens on Today. The pages are Today · Tasks · Jot · Calendar; press 1–4 to switch. Settings are behind the round sun button at the top-right of Today.
When you're ready
- Connect Apple Reminders and Apple CalendarSettings → Connections → Connect. Two-way, from every list and every calendar.
- Capture from any appSettings → This Mac → System → Capture anywhere → Enable. Hold ⌥ and tap Space twice for a note, Return twice for a task.
- Make this Mac yoursThe Dock, the window switcher, the clipboard shelf and display controls. Each opt-in, each independent.
Fluid is free while it is in beta.