About Racki
Racki turns the vocabulary from your Duolingo courses into spaced-repetition flashcards — so the words you've learned actually stay learned. No account, no sign-up, nothing to configure. Open it and start reviewing.
Enable the course sections you've finished and drill just those words — nothing you haven't reached yet.
What you get
- Spaced-repetition review that resurfaces words right before you'd forget them
- Two drill directions — meaning → word and word → meaning — each scored separately, so you can see which way needs work
- Original script with romaji alongside, including kanji, so you can always check your reading
- Choose exactly which sections are active and review only what matters now
- Progress tracked automatically as you go
- Works fully offline — the entire word set lives on your device
- Your study data stays on your device: no account, no cloud, no sign-up
- Free, kept that way by a single discreet banner ad — no pop-ups, no paywalls
Supported courses (18 and growing)
Arabic, French, German, Greek, Hindi, Irish, Italian, Japanese, Korean, Latin, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian
Contact
Questions or feedback: info@connectedparticles.com
Help
Why do I see an ad?
Racki shows a single banner ad to keep the app free. On first launch you can choose whether ads are personalised, and you can change that any time in Settings.
My course isn't listed.
We're adding courses over time. Email us and tell us which one you'd like next.
How do I reset my progress?
Your progress lives only on your device. Reinstalling the app clears all local data.
Found a bug?
Email info@connectedparticles.com with your device model and iOS version and we'll take a look.
Racki is an independent companion app and is not affiliated with, endorsed by, or sponsored by Duolingo. "Duolingo" is used only to describe the courses whose vocabulary you can review.