You finished the course. You still can't order a coffee.
Knowledge that never dies.
This time, you actually keep what you learn. Cucaracha knows exactly when each idea is about to fade and brings it back before it does. AI builds the review cards. You just show up.
Master
anything.
The problem
Learning was never your problem. Keeping it was.
You’ve done the work. The courses, the notes, the streaks, the highlighted textbooks. The learning happened. Then life did what life does, and the knowledge quietly left.
So you relearn. And re-forget. And relearn again. It feels like a personal failure. It isn’t. It’s just how memory works with nothing to interrupt the decay.
Your brain deletes what it doesn’t revisit. That’s the whole bug.
The fix has existed since 1885
Forgetting follows a curve. So we bent it.
In 1885, Hermann Ebbinghaus measured how fast memories fade. The result is the forgetting curve, and it’s brutal: most of what you learn is gone within days.
But he found the loophole too. Review something at the exact moment you’re about to lose it, and the curve flattens. Each well-timed review makes the memory more durable than the last. Do this a handful of times and the knowledge stops decaying at all.
That’s spaced repetition. It’s the most reliably proven technique in learning science, and almost nobody uses it, because doing the timing by hand is miserable.
Cucaracha does the timing. You do the remembering.
Memory retention over time
Five minutes a day, at the right moments, beats five hours at the wrong ones.
How it works
You choose what to learn. Cucaracha builds it and keeps it alive.
Drop anything in.
A vocab list, lecture notes, a chapter, a messy screenshot of your own handwriting. Cucaracha’s AI turns it into clean, well-formed flashcards in seconds. No formatting. No card-writing craft required.
Review at the perfect moment.
Cucaracha runs on FSRS, the most accurate scheduling algorithm in the field. It models your memory of every single card and resurfaces each one right before you’d forget it. Never too early, never too late, never busywork.
Stuck? Ask.
Blanking on a card is normal. Tap once and the built-in tutor explains it, gives you a mnemonic, or shows the idea in a context you’ll remember. It’s the difference between failing a card and finally getting it.
Made for language learners. Built for anything you refuse to forget.
Why Cucaracha
The fun apps don’t work. The ones that work aren’t fun.
The game
Fun, but forgettable.Streaks, gems, leagues. Feels productive every day. Then you try to use what you learned, and it isn’t there.
The power tool
Powerful, but punishing.Real spaced repetition exists. It works. It also greets you with a settings page from 2006 and makes you build every card by hand.
Cucaracha
The science of the power tool. The ease of the game. None of the guilt mechanics.
Your memory does the leveling up.
Plans
Reviewing is free. Forever. That’s a promise.
Your cards and your reviews will never sit behind a paywall. Spaced repetition only works if you show up every day, so that part stays free for life. The AI is what you upgrade for.
Free
Reviewing, forever
- Unlimited cards, unlimited reviews
- Full FSRS scheduling
- A taste of the AI, on us
Pro
The AI you upgrade for
- Unlimited AI card generation
- AI editing and cleanup
- The tutor, whenever you’re stuck
Learn it for good. Keep it for life.
Five minutes a day. Knowledge that never dies.