hashcards is a plain-text spaced repetition system that keeps study material in human-readable files. Rather than requiring a dedicated card editor, it lets users create and maintain decks with their preferred text editor.
The software separates card content from learning history, which is maintained in a local SQLite database. Study sessions are launched from the command line and presented through a browser interface running locally.
Its scheduling uses the Free Spaced Repetition Scheduler (FSRS), which adapts review intervals according to the learner’s performance. The application is suitable for studying factual material, languages and technical subjects, particularly where notes already form part of a text-based workflow.
This is free and open source software.
Key Features
- Stores flashcards in plain-text Markdown files.
- Supports question-and-answer, cloze deletion and term-definition cards.
- Uses FSRS to calculate review intervals based on card performance.
- Four review grades: Forgot, Hard, Good and Easy.
- Content-addressable cards identified by hashes of their text.
- Supports multiple cloze deletions within a single card.
- Sibling burial prevents related cloze cards from revealing answers during the same session.
- Renders mathematical expressions using KaTeX, including custom macros.
- Supports images, audio, Markdown tables and syntax-highlighted code.
- Allows deck names to be overridden using TOML frontmatter.
- Configurable limits for the number of cards and new cards presented during a study session.
- Collection statistics and integrity checking.
- Tools for identifying and removing orphaned cards.
- Export flashcard collections to JSON.
- SQLite database stores review history and scheduling information.
Website: github.com/eudoxia0/hashcards
Support:
Developer: Fernando Borretti
License: Apache License 2.0
Hashcards is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| Terminal-Based Flashcard Software | |
|---|---|
| hashcards | Plain text-based spaced repetition system for flashcards |
| repeater | Like a lightweight, text-based Anki you run in your terminal |
| mdfc | Learn with flashcards and spaced repetition |
| hascard | Minimal command-line utility for reviewing notes |
| HardV | Billed as a powerful cross-platform flashcard program |
| Vocage | Minimalistic terminal-based vocabulary-learning tool |
| Flashdown | Spaced repetition using flashcards in Markdown |
| carddown | Spaced repetition for markdown notes |
| terminal-anki | Keyboard-driven flashcards with spaced repetition and Anki imports |
| GoCard | Markdown-based flashcard system with spaced repetition |
Read our verdict in the software roundup.
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