Piper

A learning app you won't abandon.

Piper reads with you

Every source in one library

Books, articles, papers, saved pages. Import once and they all live in the same library, with the same highlights and the same search.

Notes that link themselves

Highlight while you read. Piper turns highlights into notes and notes into a graph, so the thing you wrote in March finds you again in July.

Review built from what you read

Spaced review scheduled with FSRS-6, in the same app as the reading it came from. Nothing to keep in sync, because nothing lives anywhere else.

Piper library — books, papers, and articles in progress alongside recent notes

Piper notes — notes linked back to the sources they came from

Piper at night — pick up a source where you left off

You didn't mean to end up with nine apps

Highlights in one place, notes in another, cards in a third, and the article you swear you saved in none of them.

Learners overwhelmed by a pile of disconnected note-taking, highlighting, and flashcard apps

One workspace, end to end

Reader

Read EPUBs, PDFs, and web articles in one reader. Highlight, annotate, and jump to any passage later without remembering which app it lived in.

Notebook

Block-based notes with wikilinks and margin comments. Type @ to connect a thought to a source, a note, or a highlight you made months ago.

Review

Spaced repetition scheduled with FSRS-6. Nested decks, three card types, and a review history that stays optimizable even if the scheduling algorithm changes under it.

Chat

Ask a question and get an answer drawn from everything you have read, not from the open internet. Every claim points back to the book, paper, or article it came from, and the page it sat on.

Your library never has to leave your device

Piper is local-first. Your sources, highlights, and notes live in a database you own, on hardware you control.

Learn more about local-first

Learn faster with Piper

macOSRequirements pending verification

Windows x64Requirements pending verification

Signed desktop downloads are not available yet.

Download and update checks contact Piper's public release service. They send ordinary network request information, never your Vault or what you read and write.