carddown is a command-line flashcard application for people who keep their notes in plain text.
It extracts flashcards from Markdown, text, and Org files, stores study data locally in a .carddown directory with a SQLite database, and tracks cards by content hash so they can survive file edits and moves. It also provides an interactive terminal study interface for reviewing due cards and managing problematic cards.
This is free and open source software.
Key Features
- Scans Markdown, text, and Org files to extract flashcards.
- Supports incremental scanning, with full scans available to detect orphaned cards.
- Offers interactive revision sessions for due cards in a terminal user interface.
- Implements SM2, SM5, and Simple8 spaced repetition algorithms.
- Lets you filter revision sessions by tag.
- Includes cram mode to review cards regardless of schedule.
- Can randomly reverse prompt and response during study sessions.
- Provides an audit mode for reviewing orphaned and leech cards.
- Cross-platform support – runs under Linux and macOS.
Website: github.com/martintrojer/carddown
Support:
Developer: Martin Trojer
License: MIT License

carddown is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| Terminal-Based Flashcard Software | |
|---|---|
| mdfc | Learn with flashcards and spaced repetition |
| tui-deck | TUI frontend for Nextcloud Deck |
| Revise | TUI Anki client |
| trrc | ToRRential Card processor |
| 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 |
| studyFlash | Learn flashcards in your terminal |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

