iKnow! is a companion study tool for the iKnow! website. With this app, you can enjoy the iKnow! experience on your phone or tablet.

All iKnow! study progress on your iOS 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 courses cover the 6,000 most commonly used words in Japanese. The Chinese courses cover the 2,000 most commonly used words in spoken Chinese and over 1,200 words commonly used in newspapers and magazines. (All Chinese courses are available in both Traditional and Simplified Chinese.) All words have sample sentences and audio.

“The iKnow! Learning Engine”

iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! adapts to differences in learning speeds and item difficulty, constantly measuring memory and predicting performance across all of your items. iKnow! does this by tracking your performance and then predicting your optimal review time on an item-by-item basis.

All you have to do is push the study button, and iKnow! tells you what to learn.


- Five study modes: iKnow!, Rapid Choice, Self Check, Sentence Trainer, and Listening.
- iKnow!: Master words and phrases with our patented learning algorithms.
- Rapid Choice: Fast-paced quizzing and review.
- Self Check: Judge yourself on what you know and how well.
- Sentence Trainer: Master sentence patterns by listening and then dictating.
- Listening: Listen to content on the go. You can slow down and loop any audio.
- Study progress synched across iOS and PC accounts.

What’s New

Version 5.3.0

- New study preference: In Preferences, sentence translations and/or transliterations can now be hidden for all study modes. Tap to unhide them.
- Preferences in Study: Each study mode will now show relevant preferences you can easily access and modify.
- Bug fix: Self Check is now recording study time correctly.
- Removes Facebook and Google login methods.
If you have any issues logging in, please contact us at
- Other small bug fixes and improvements.

Ratings and Reviews

4.8 out of 5
359 Ratings

359 Ratings

Stephenos713 ,

Absolutely Amazing!!!

I have been studying Japanese for several years now but still knew I had a lot to learn. As a self-taught Japanese speaker, it can be quite discouraging when the tools are not able to meet you where you are at. However, iKnow! Has done a wonderful job combining an SRS with not only vocabulary, but also grammar. While grammar rules are not explicitly explained, one can't avoid picking up the grammar rules through the example sentences and the many venues of study. Finally able to focus my studies through a streamlined application that is beautiful on mobile as well as on the browser. Very user friendly and definitely worth the reasonable membership cost.

LaCaren ,

Worth the cost

I’m one of those procrastinators who studies for a few months and then stops for...more. During my non-procrastination time, iKnow has always given me the best learning rate of any tool. Everything has sentences, with full audio, Japanese text is always bigger than English text. Premade courses, a mode to study all your courses together, and my favorite thing: a sentence listening mode.

Great for people like me who can listen along while working or working out. Passive learning when you are doing something else is better than no learning. It’s too bad the PC version doesn’t have it.

The subscription cost keeps me longer before I fall back into bad habits (no app can fix my laziness but this one holds me the longest). It’s just easier to be motivated longer when you have to pay and get your money’s worth !

It’s in big thanks to this app that I can play video games in Japanese.

Things I would love to see in the future: for each course to have a “story”, or multiple, that utilizes most of the vocabulary that was in said course. Sentences are great, but having short stories to test my understanding with would be even more awesome.

And for the PC version to someday get the sentence listening mode.

Developer Response ,

Thanks for your great review!! We are so glad to hear that "no app can fix my laziness but iKnow! holds you the longest". Thank you for your valuable feedback about the content and listening mode. We will take your suggestion into consideration as we plan our future developments to improve the overall usability of our service.

dannyc386 ,

Chinese-The Best

After searching and using 99% of the Chinese apps, this is in my top 5. It’s the most well rounded and user friendly course that actually helps early intermediate students continue inhaling vocabulary and sentences mining in an interesting way.

I’m hoping that the developers continue to build on the Chinese courses because they’re sitting on a gold mine. Genuine Chinese language apps for the early intermediate self learner are scarce and this is the best on the market in my opinion.

Developer Response ,

Thank you for studying Chinese on iKnow!. So glad to hear your great review! If you have any concern and questions, feel free to contact us anytime from the app:)

App Privacy

The developer, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • User Content
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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