A tower defense game you win by knowing your flashcards.
Free on Android · iOS beta on TestFlight, App Store coming soon.
Combine the power of spaced repetition flashcards with the thrill of tower defense.
Bring your own Anki decks (.apkg) or pick a ready-made one inside the game — vocabulary, formulas, history dates, anything you need to learn. See how to use your own Anki decks.
Every correct answer spawns combatants or builds towers. The better you study, the stronger your defenses.
Complete missions of increasing difficulty while mastering your material. Get it wrong? The enemy pushes through.
Studying doesn't have to feel like a chore.
Research shows active recall is one of the most effective study methods. Cathartic turns every flashcard into a meaningful decision — answer correctly or lose ground.
From language learning to medical school to coding interviews — if you can put it on a flashcard, you can play it in Cathartic.
Quick sessions on the bus. Intensive review before an exam. Cathartic adapts to your schedule and keeps you hooked.
Pick a ready-made deck inside the game, or bring any Anki deck through the Study app. Your review history travels with the cards, and the add-on carries it back into Anki.
Tips, strategies, and ideas for effective learning.
Why enjoyment is the secret weapon for language acquisition — and how to build a study routine you actually look forward to.
Read more → Study TipsTurn your favorite foreign-language films into powerful study material you can use in Cathartic.
Read more → Speaking PracticeHow to complement your flashcard study with real conversation practice — and why iTalki is a great fit.
Read more → CollegeA practical system for turning lecture notes into flashcard decks — and then into tower defense battles.
Read more →Get Cathartic and turn your study sessions into epic tower defense battles.
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