Solid Memo

Spaced-repetition flashcards that live in your own Solid Pod.

Solid Memo is a free flashcard app. It shows you each card again just before you would forget it, so a few minutes a day are enough to remember what you learn. Your cards and your progress are kept in a Solid Pod that you choose, not on our servers.

Screenshots

The app in English on a phone, as a guest tries it with no account, after some weeks of study; the Studio on a desktop's screen.

Your decks
Studying a card
A course's chapter
The deck library
Your progress
Study activity
Solid Memo Studio, for deck authors

For learners

Study flashcards a little every day. Solid Memo schedules each card with the SM-2 method, or with FSRS-6 if you choose it: a card you know comes back after days, then weeks; a card you forgot comes back soon.
Start right away as a guest, with no account. What you study is kept in your browser, and you can move it into your own Pod when you log in.
Add ready-made decks and courses from the library, or make your own decks. A course teaches a subject in short chapters, and every question you answer becomes a card to review later.
Your data is yours: it lives in your Pod, in open formats, and you can take it with you. Solid Memo keeps no account of yours and costs nothing.
The app speaks English, Swedish, Korean, German, Spanish and French.

For deck authors

Write decks and courses in Solid Memo Studio, the app's workspace for authors. Drafts are kept in your own Pod.
Check a draft against the rules a release must meet, then try it out as a learner would, without touching your own study.
Publish a release in your Pod, readable by anyone, and share its link. Or save it as a file and propose it for the library.
Cards and theory can use Markdown: emphasis, lists, tables and links. Each deck states its own license.

For technologists

A static web app in TypeScript and Preact, with no back end: it talks to the user's Solid Pod directly, and logs in with Solid-OIDC.
Data is RDF. Solid Memo's own vocabulary and SHACL shapes are published with the site, and the app checks the data it reads against them. The deck library is a DCAT catalog that conforms to DCAT-AP.
Hexagonal layers, each its own package, with 100% test coverage, and end-to-end tests against several Solid servers.
Released under the MIT License. Read the architecture to find your way around.

For decision makers

No lock-in: learners keep their data in a Pod of their choice, in open standards (Solid, RDF, DCAT-AP, SHACL) that other software can read.
Nothing to host but static files. Anyone can run their own copy on any web server, under the MIT License.
Solid Memo is stable from version 1.0.0, and a change that breaks what it stores comes with a new major version. It is a volunteer project, run by one maintainer, with no funding and no organization behind it.
It works toward the Standard for Public Code; see the assessment. Questions and ideas are welcome in the issue tracker.