Kaku is a Japanese learning app aimed at beginner-to-intermediate learners. It helps them with sentence structure/formation by combining a number of tools into one app:
- A translator to give you live feedback on your sentence structure
- dictionary look-up on highlighted Japanese or English words. Quick Replace (⌘ + R) on a highlighted English word to replace it with the Japanese equivalent.
- Text-to-speech audio translation which highlights the text being spoken so you can shadow read and improve your pronounciation
- Saved sheets that sync between your iPhone and iPad so you always have them with you
- Common word lists across many categories
- Grammar examples from the popular Tae Kim's Grammar Guide that provide a template for your sentences
- Clipboard auto-translate so you can copy any text snippet on the web and quickly see what it means
- Reader Mode that improves readability on larger devices

Please follow @kaku_app to stay up-to-date and provide feedback for future versions.

What’s New

Version 2.60

Ummm, ah, well... added a list of Conjunctions to the Word Bank for those times when you get stuck on how to segue to your next train of thought.

Ratings and Reviews

4.2 out of 5
6 Ratings

6 Ratings

babysadist ,


This app definitely lessens the waste of paper! But I found I was focusing more on trying to get the translation correct instead of writing! Well-developed regardless!! The Word Bank widget seems right up my alley for an everyday review of words I tend to forget, so I’ll absolutely be trying this new feature!

Developer Response ,

Thanks for your feedback. I find an effective way to use the translator is to only translate when you are not sure if your sentence is structured correctly rather than at the end of every sentence.

I’m glad you like the widget, it took a lot of effort to work out how to implement them. But now that I have figured it out, I look forward to creating more. 🙂

the_jackdalton ,

Essential for Learning Japanese

I have only recently started learning Japanese, but I have found Kaku to be essential in keeping myself immersed in the language everyday. The grammar examples have helped me to understand and work with various conjugations and special word forms. The selected words make Kaku easy to use in quick situations.

A lot of love and care has gone into this app. If you have any inclinations in getting the app; do it! It is wonderful to use on a daily basis, and I know it will continue to help me in my language learning journey for a long time.

sweetsknight ,

Awesome premium features

I use this app on my iPad in my class all the time and really recommend upgrading to premium to access the text-to-speech, better translations/dictionary and reader mode.

With so many language learning apps out there, this app is a hidden gem.

Developer Response ,

Thanks for your support, I’m glad you’re getting great value out of the premium upgrade!

App Privacy

The developer, Dittman Shum, 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:

  • Purchases

Data Not Linked to You

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

  • Usage Data
  • 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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