When you're learning a new language, the hardest part isn't seeing a word for the first time — it's remembering it weeks later. Spaced repetition is the technique Trakaido uses to solve this problem.
The idea
Memory fades over time. If you learn a word today and never see it again, you'll likely forget it within days. But if you review it at the right moment — just as it's starting to slip — the memory gets reinforced and lasts longer. Each successful review pushes the next one further into the future.
This is spaced repetition: reviewing material at increasing intervals to move it from short-term to long-term memory.
How Trakaido applies it
Trakaido's Journey Mode is built around spaced repetition. When you start a session, the app selects a mix of words that are due for review and new words you haven't seen yet. Words you get right come back less often. Words you struggle with come back sooner.
The app varies the way it tests you — flashcards, multiple choice, listening comprehension, typing — so that you're building recognition and recall across different skills, not just memorizing one pattern.
Why it matters for language learning
Language learning involves thousands of vocabulary items, each needing to move from "never seen" to "instantly recognized." Studying everything equally wastes time on words you already know. Spaced repetition focuses your effort where it's needed most, which means you can learn more in less time.
It's not a shortcut — you still have to put in the practice. But it makes sure that practice counts.