github.com
AnkiDroid is the official Android port of the open-source Anki spaced repetition flashcard system. It supports spaced repetition learning using the AI-optimized FSRS algorithm, and allows users to create flashcards with text, images, sounds and MathJax content. It offers features including night mode, AnkiWeb syncing, text-to-speech integration, access to over 10,000 premade decks, and the ability to add cards from other applications.
