Second brain

Find the useful thing you saved.

Keep notes, useful quotes, PDFs and screenshots together. When you need one again, search for what you remember and return to the original context.

Today this is spread across

Highlights in a reading app, PDFs in a downloads folder, screenshots in the camera roll, notes in three places, the connections only in your head. A second brain that is spread across six apps is not one.

In Nested List
  • Capture without filing.A quote, a fact, a screenshot, a PDF: each one is a line, under whatever it belongs to, or under nothing yet.
  • Link ideas.Type [[ to link any note to any other. Every note shows what links back to it, so an idea is never stranded.
  • Remember everything.AI-powered search reads your notes, the text inside your PDFs, the words on your screenshots and what is in your photos.
  • Still instant in ten years.Tens of thousands of notes still open in well under a second; the ones from your last job are as close as this morning’s.

Let your collection grow naturally.

Put related ideas together when it helps. Fold a topic away, open a branch as a page, or search across the whole list.

Shift+Enter adds a longer note under any line; open any line as its own page when it grows.

A topic a week in: facts, quotes, sources with a book page and a PDF, thoughts still rough.

Everything you saved comes back.

A second brain is only as good as its recall. Type what you remember and every result says why it matched: the words, the meaning, the text inside a file, or what a picture shows.

PDF text is read on your device. Text in photos, what is in them and search by meaning use AI; one switch in Settings → General turns it off.

One search: a note, the text inside a PDF, the words on a screenshot, and what a picture shows.

Connected, not filed.

Link a thought to the quote it leans on, a paper to the project it informs. Later, from either end, the other is one click away.

Backlinks are one click away in any item’s menu.

The quote knows which of your thoughts cites it.

Everything on your mind, in one place.

Open Nested List, type your first line, and put the next thought under it. That is the whole setup.

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