Smart Vocabulary Learning

Make learning
fun!

Master vocabulary effortlessly with Koki Flashcard - the smart flashcard app powered by spaced repetition technology. Available on iOS and Android.

★★★★★4.7 · 10K+ Reviews

Download the app:

Koki Flashcards app
200K+Downloads
300K+Active Users
50+Vocabulary Packs
4.7App Store Rating

Koki Flashcard for you

At School

At School

Study in groups with words provided by teachers or friends. You can create word groups and share them with other members.

At Work

At Work

When feeling tired, take a break and swipe left, swipe right; you'll significantly enhance your language skills.

At Home

At Home

Reinforce your learning anytime, anywhere to enhance your vocabulary retention.

Why Koki Flashcard?

Safe & Secure

Your data is protected with industry-standard encryption. We comply with GDPR and international privacy regulations.

Cross-Platform

Available on both iOS and Android devices. Learn seamlessly across all your devices with synced progress.

Track Your Progress

Detailed statistics and learning analytics help you monitor your improvement and stay motivated.

Multi-Language Support

Learn vocabulary in multiple languages including English, Vietnamese, Japanese, Korean, and more.

Cloud Sync

Your learning data is securely synced to the cloud, so you never lose your progress across devices.

Built with Love

Developed by Koki Software JSC, a passionate team dedicated to making education accessible and enjoyable for everyone.

What does Koki Flashcard offer?

Curated vocabulary
Curated vocabulary

Choose from hundreds of curated vocabulary packs, reviewed and standardized so you always get quality content at every level.

Smart spaced repetition
Smart spaced repetition

Our smart algorithm adjusts to your learning pace and focuses practice on the words you forget most — so every session counts.

Fun way to learn
Fun way to learn

Swipe left if you don't know a word, swipe right if you do. A simple, addictive method that helps you master vocabulary fast.

Writing & Dictation Practice
Writing & Dictation Practice

Write characters by hand, type full sentences, or transcribe AI dialogues. Active writing reinforces what you learn and builds real accuracy.

Long-term Quiz Memory
Long-term Quiz Memory

Play Match Quiz, Choice Quiz, and full review tests to lock in difficult words. Fun games that make memorization stick for the long term.

How It Works

1
Download & Sign Up

Download Koki Flashcard from the App Store or Google Play. Create your free account in seconds.

2
Choose & Learn

Browse curated vocabulary packs or create your own. Start learning with our smart swipe-based method.

3
Master & Achieve

Track your progress, earn achievements, and master vocabulary through daily practice with spaced repetition.

Supported Languages

Choose a language to explore vocabulary packs tailored for you

English
English
French
French
Japanese
Japanese
Korean
Korean
Spanish
Spanish
Chinese
Chinese
Thai
Thai
Vietnamese
Vietnamese
German
German
Norwegian
Norwegian
Danish
Danish
Italian
Italian

Reviews from customers

★★★★★

“Koki Flashcard is a powerful and flexible learning app that helps you create and manage flashcards for memorizing vocabulary or any knowledge. With smart algorithms and high customization, it's an effective tool you shouldn't miss for learning languages or new subjects.”

Martha
Martha
Koki Flashcard won me over with its effective learning approach.
★★★★★

“Koki Flashcard is the ideal companion for language learners. Its smart spaced repetition system makes vocabulary retention easier, combined with audio, images, and vivid examples. A rich community-contributed flashcard library and flexible customization help you make steady progress.”

Leo Nguyen
Leo Nguyen
I'm hooked on Koki Flashcard for its outstanding memory retention.
★★★★★

“Koki Flashcard is the app I always trust and recommend to my students. Customizable flashcards suit all levels, combined with smart repetition and multimedia support, helping language skills improve noticeably.”

Lealia
Lealia
I love Koki Flashcard and want to recommend it to you.

Start learning today

Join 50,000+ learners mastering vocabulary with Koki Flashcards. Free to download on iOS and Android.

Blogs

Celebrate Canada Day & U.S. Independence Day with KOKI – Get 10 Days Premium
Celebrate Canada Day & U.S. Independence Day with KOKI – Get 10 Days Premium

July is a meaningful month for many people around the world, especially for those who celebrate the national holidays of Canada and the United States. On July 1st, Canada celebrates Canada Day, a special occasion that honors the country’s history, culture, diversity, and national spirit. It is a day filled with joy, pride, fireworks, community […]

19/06/2026

Learn Smarter with Koki Flashcards
Learn Smarter with Koki Flashcards

Learning something new is exciting, but remembering it for a long time is often the real challenge. Many learners have experienced the same problem: they study carefully today, but a few days later, most of the information starts to fade away. This does not mean you are not studying hard enough. It simply means your […]

18/06/2026

koki flashcards,
Koki Flashcards New Version: Learn Smarter with AI and Challenges

Koki Flashcards has released a new version with exciting features designed to make vocabulary learning more active, practical, and motivating. In this update, learners can practice listening and writing with AI, take smart vocabulary mini quizzes, and join learning commitment programs to earn Premium rewards. This update helps users go beyond simply memorizing words. With […]

04/05/2026

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