iKnow!

In-app purchases
3.57K reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Digital Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

iKnow! is a personalized language learning tool based on advanced learning algorithms designed to help you learn faster and more efficiently.

The mobile app is a companion study tool to the iKnow! website (iknow.jp). With this app, you can enjoy the iKnow! experience on your phone or tablet.

Your iKnow! study progress on your Android device is automatically synched to your PC account, so you can study in the way that best matches your needs and lifestyle.

“Japanese, Chinese, and English”

Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese Core 6000 covers the 6,000 most commonly used words in Japanese, and the Chinese Core 2000 covers the 2,000 most commonly used words in Chinese. All words have sample sentences and audio.

“Spaced rehearsal learning”

iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! calculates an optimal moment to review what you have learned so that you can learn more effectively.

“Guided study”

iKnow! tells you what to study and when. Based on your targets and performance, iKnow! manages your study for you.


**************

Features:
- Five study applications: iKnow!, Self Check, Rapid Choice, Sentence Trainer and Listening.
- iKnow!: Master words and phrases with our patented learning algorithms.
- Self Check: Quickly self-assess your own knowledge.
- Rapid Choice: Fast-paced quizzing and review.
- Sentence Trainer: Master sentence patterns and constructions.
- Listening: Listen to content on the go. You can slow down and repeat any audio.
- Study progress synched across Android, iOS and PC accounts
iKnow! - Master Japanese and Chinese. Your Personal Language Learning Tool.
Updated on
Dec 17, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Financial info and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

3.2K reviews
Jon Rulz
October 12, 2021
I enjoy this app more than anki. If you choose review 50 words a lesson. You can get 5-10 hours of using this app free. I find that it makes learning very convenient. However, the pricing is high imo. This app has no lifetime version, which almost killed it for me. I have memrise and drops lifetime. Duolingo is free. This is the only app where im forced to pay monthly or yearly. Non the less, it does a better job than anki, I like the convenience of it. Its an oldie but a goodie
5 people found this review helpful
Did you find this helpful?
DMM.com LLC
October 26, 2021
Thank you for providing your valuable feedback! If you have any concern, please feel free to contact our support form the app.
A Google user
January 9, 2020
Love this app, I use multiple apps for studying Japanese, but this is my go to for vocabulary and even has great audio content. It breaks the core 6000 words down in sections of 100 words for each step. Ex. Core 2000 step 5 would be from 2,500 to the next 100. (2,600) and so on. May ways to quiz yourself and love the SRS system it uses. The only thing I'd change is make it an option to be forced to type in each Japanese word instead of having it be random. This would improve recall. GREAT APP!!
4 people found this review helpful
Did you find this helpful?
DMM.com LLC
January 10, 2020
Thank you for your great review!! As you mentioned you'd like to type in each word, we recommend dictation quiz that you can study on Sentence Trainer. Please switch the Study mode ( https://support.iknow.jp/hc/en-us/articles/360000280261 ) and turn off Builder quiz in the session start screen. Happy studying :)
Laura HT
September 21, 2020
Best japanese app I've used, in my opinion! The only app I've paid for for japanese. I do wish there was a one off payment option, rather than subscription model, but otherwise it is exactly what I want. It's a good tool for vocab, giving you a mix of words on different subjects and in different contexts (sound only/kanji only /fill in the blanks /multiple choice etc) which means you can't just guess the word from the pattern of questions, which I find happens a lot in other apps.
5 people found this review helpful
Did you find this helpful?
DMM.com LLC
September 24, 2020
Thank you for your great review! Please feel free to contact our support if you have any concern and problems :)

What’s new

・ Fixes some crashes.
・ Fixes UI not displaying correctly in some tablets.
Content rating
Everyone
Digital Purchases
Learn more

App support

About the developer
DMM.COM LLC
systems@iknow.jp
3-2-1, ROPPONGI SUMITOMO FUDOSAN ROPPONGI GRAND TOWER 24F. MINATO-KU, 東京都 106-0032 Japan
+81 90-9108-7090