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Hand off the to-do. Get back the result.

Crescendo is a to-do list for your Mac. Give a to-do to Claude, the AI assistant, and it does the work. You read what comes back, and one click ticks the to-do off.

See how it works Beta status

Free during the beta Mac with Apple silicon Claude Pro or Max

A person with eyes closed, one hand sending away a floating glass panel while others circle overhead.
Claude is on itComparing three quotes
Result readyA reply to the landlord
Ticked offAfter your yes
Day plannedBy Claude, around two meetings

Claude does the work. Crescendo keeps your list , your plan and the final yes.

Claude works through Claude Code, Anthropic’s tool for your Mac, on your own Claude plan. Crescendo has no AI of its own.

Two steps, one yes.

01Hand it off

Give the to-do to Claude.

Pick a to-do and press Delegate. Claude starts on it and tells you what it is doing in plain words. Watch, or carry on with your day.

Claude works with what you keep in the project, like letters, quotes and scans.

The to-do “Reply to the landlord about the deposit” is handed to Claude. Claude reads the landlord’s message, looks at the move-out photos and writes a short, polite reply. The to-do is then ready for your review.
02Read and approve

Read the result. Say yes.

The result comes back to the same to-do: a reply written, quotes compared, a plan made. Press Approve and the to-do ticks itself off. Not quite right? Send it back with a note in your own words.

Claude drafts the reply. You decide whether to send it.

The reply Claude wrote to the landlord, ready for your review. You press Approve, and the to-do is ticked off.
Also: plan the day

A day that fits.

Claude can plan your day too. It places your to-dos between your meetings and keeps some time free. Nothing moves until you press Add to calendar.

Uses the calendars on your Mac. Claude sees your day only after you allow it in Crescendo’s settings.

Claude’s plan for Wednesday: four to-dos fit around a call with the contractor and a visit to the dentist, shown on a thin line for the day and as a short list. You press Add 4 to calendar, and each to-do gets its time.

Results, ready to use.

A few to-dos worth handing off, and what Claude hands back.

Compare the three worktop quotes

WorktopPriceReady in
Oak€1,2403 weeks
Quartz€1,5802 weeks
Laminate€6401 week

Laminate is the cheapest and the first to arrive.

Plan the Lisbon trip day by day

  1. FriLand at 14:20, check in, an evening walk in the old town
  2. SatThe old tram up the hill, lunch by the river
  3. SunThe market in the morning, fly home at 18:05

Add up this month’s receipts

€1,184.60

from 23 receipts

2 have no date

Claude works with what you keep in the project: quotes, booking confirmations, scanned receipts, notes.

Big plans, small steps.

Write down what you want and why. Split it into milestones with dates, put to-dos under each, and see how far you have come.

The goal “Kitchen ready for the holidays”, due on Wednesday 16 December, with why it matters and how it is measured. One of four milestones is done; the next is “Orders placed”, due on 26 October. Each milestone has its bar on a line from now to the goal’s day. A to-do under “Orders placed” is ticked off and its bar fills from one to two of four.
  1. The goal, and whyOne line on what it is for, so the reason stays in front of you.
  2. Milestones with datesThe stops along the way, each with its own day.
  3. To-dos under eachOpen a milestone to see its to-dos. Tick them off yourself, or hand some to Claude.
  4. Progress at a glanceWhat is done, what comes next, and where today falls on the way.

One calm window for all of it.

Your projects, today’s list and your calendar, side by side. Type a to-do the way you would say it, like “Call the plumber tomorrow at 9”, and the date fills itself in.

Crescendo with a kitchen renovation project open: a cover picture, to-dos in sections, and one to-do Claude is working on.
Today: the day as one thin line at the top, then today’s to-dos, each on one row.
The week in the calendar: meetings, and to-dos with a time shown as blocks next to them.

Your list stays on your Mac.

Your to-dos live in one file on your Mac, backed up every day. No account, no cloud, no tracking. When Claude works on a to-do, what it reads goes to Anthropic, as it does whenever you use Claude.

No accountNo trackingDaily backups30-day Trash

Before you ask.

Short answers to the questions people ask first.

A Mac with Apple silicon (M1 or later) on macOS 15 or later. To hand off to-dos you also need Claude Code, Anthropic’s tool that lets Claude work on your Mac, signed in with a paid Claude plan such as Pro or Max. Your lists, goals and calendar work without it. The app speaks English and Polish.

Crescendo is free during the beta. After it, your lists and handing to-dos to Claude with your review stay free for good, and some other features move to a paid plan. Claude’s work counts toward your own Claude plan with Anthropic.

Claude. Crescendo keeps your list, passes the to-do to Claude Code on your Mac, shows you the result and ticks the to-do off when you approve. Claude works with the files in the project’s folder on your Mac, such as quotes, letters, scans and photos, and saves its results there.

Your to-dos stay in one file on your Mac, with a daily backup and a Trash that keeps deleted items for 30 days. There is no Crescendo account, no server and no tracking. When Claude works on a to-do, what it reads goes to Anthropic under your Claude account. You can export everything to one file at any time.

The to-do stays open until you approve it. Send it back with a note and Claude tries again, or dismiss the result and do it yourself. You can stop Claude at any moment.

Where the beta stands.

Crescendo is in a closed beta with a small group of invited testers. The public beta comes next, with the download on this page.

  1. Closed betaRunning now, by invitation.
  2. Public betaNext. Download it here.
  3. Paid planLater. Lists and hand-offs stay free.

Everything is free during the beta. There is no waiting list yet: it opens together with a privacy policy.

A relaxed person leaning back with hands behind the head, eyes closed.