Kotatabi言葉旅Where language becomes a journey.
Spaced repetition, gamified motivation, and a community that keeps you coming back. Built on a method that actually works.
12
day streak
3
Languages
89%
Retention
43
Active days
Weekly goal
2,400+
active learners
150,000+
reviews completed
4.8
average rating
The method
A method backed by science. A system that keeps you going.
Spaced repetition is the same memory technique used by medical students and polyglots — reviewing words right before you'd forget them, so they move into long-term memory. Kotatabi pairs that proven method with progress tracking and a community that makes showing up every day easier than skipping it.
Based on decades of cognitive science research on memory consolidation.
The science
Reviews are timed to hit right before you'd forget — proven to boost retention 200% over cramming.
The accountability
XP, streaks, and levels turn invisible progress into something you can see grow every single day.
The motivation
Leaderboards and friends make studying a little bit social — users with an active streak group are 47% more consistent.
What does this mean? Tap to reveal
Swipe left for Again, right for Good
Reviews that actually stick
See it, try to recall it, rate yourself. Swipe or tap — it takes seconds, and it's the fastest way to move a word into long-term memory.
Everything you need to learn faster
Smart reviews
Every word timed to your memory. The scheduler learns when you're about to forget and shows the card at the perfect moment.
AI-built decks
Describe what you want to learn. Get flashcards in seconds, with readings, example sentences and audio.
Streaks and XP
Daily streaks create habit. XP makes progress visible. Coins unlock cosmetic rewards.
Weekly leagues
Compete with friends and climb the global ranking. Social pressure is the strongest motivator.
Track everything
Reviews, retention rate, active days, XP milestones. See exactly how much you've learned and where to focus next.
1,247
Reviews
89%
Retention
43
Active days
186
New words
6.2d
Avg interval
This week
30 reviews
Down 67% from last week. A quick session can turn it around.
14-day trend
Retention
Memory strength
What learners say
Yuki T.
🇯🇵 Japanese
"I tried Anki, Memrise and Duolingo. Kotatabi is the only one where I kept my streak past two weeks. The leagues keep me honest."
Marco R.
🇦🇷 Spanish
"I recommend Kotatabi to all my students. The AI deck builder saves me hours of prep, and the spaced repetition actually works."
Sarah L.
🇺🇸 Spanish
"The daily goal feature changed everything. I used to study in random bursts. Now I do 15 minutes every morning and my retention is way up."