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Local-first spaced repetition

A quieter way to remember what matters.

Miyu is a beautiful, local-first spaced repetition app. Study with FSRS, keep your notes in files you own, and turn courses into flashcards you will actually review.

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Free to start · No account needed · Web, desktop, iOS, and Android

  • FSRS scheduling
  • 38 courses
  • 15 series
  • 57 UI languages
  • Plain Markdown
  • Open source

Built for memory, not busywork

Four decisions shape the app: a scheduler you can inspect, files you own, courses that become cards, and sync that merges.

FSRS, not guesswork

Each card keeps a memory state, and FSRS schedules the next review near your 90% retention target. The reviewer shows the date before you answer.

Your notes, your files

One collection on your device: Markdown notes, JSON decks, monthly review logs, and verified ZIP backups. Open any of it in a text editor.

Courses that become cards

38 official and community courses in 15 numbered series. Read a lesson, select a line, and keep it as a flashcard.

Sync that merges

Optional sync built on Automerge. Offline edits merge instead of overwriting, and uploads go straight to storage with short-lived credentials.

Learn something worth keeping

Series are numbered in a suggested order. Start at the first course and keep going, or pick a single course and stop there.

See all 38 courses

Three steps, then it is just habit

  1. Add a course or deck

    Pick a course from the catalog or start a deck of your own. Adding copies it into your collection, not into an account.

  2. Study a little every day

    A short queue, two grades, and the next due date visible before you answer. Ten honest minutes is the whole routine.

  3. Let FSRS handle the timing

    Each review updates the card’s stability and difficulty, so the next date lands near your target retention.

Your memory should outlive the app

Miyu keeps your collection on your device in a format you can read without it. There is no server between you and your notes.

How local-first works Optional sync
  • One collectionProfiles, decks, cards, courses, and review history live together.
  • Plain MarkdownEvery note is its own Markdown file under notes/.
  • Verified ZIP backupsRestores check the archive and take a safety backup first.
  • Optional syncOff with no account. On, it merges offline edits instead of overwriting.

Questions, answered

Is Miyu free?

Yes. The app is free to use. Miyu Sync is an optional $4.99/month subscription with a 14-day free trial and 10 GB of cloud storage. You can keep everything on your device without an account.

Does Miyu work offline?

Yes. Miyu is local-first: you can add cards, study, and browse courses without a connection. If you use sync, changes merge when you are back online.

Where is my data stored?

In one collection on your device: a folder on desktop, local storage in the browser, or the app's local storage on mobile. You can export a verified ZIP backup at any time. Sync is optional.

What is FSRS?

FSRS (Free Spaced Repetition Scheduler) is a modern scheduling algorithm. It models how stable each memory is and schedules the next review near your target retention — 90% by default.

Are the courses free?

Yes. Official and community courses are part of the app. You can add a single course or a whole series, and each course can create its own premade deck.

How many languages does Miyu support?

Miyu ships 57 UI translations, with English as the default and fallback. The language setting travels with your collection.

Start remembering

Open Miyu Browse courses

No account needed to start.