Using the Application


Review Mode and the Timer

You can put the app in review mode and test what you have learnt by viewing flash cards. Also, when interacting with the review pages the next Kanji can be displayed either manually or by starting the timer. The timer drop down menu initially displays "timer idle". You can start the timer by selecting one of the "start n" options. The numbers are in seconds! The timer can be halted by pressing the "stop" button. While the timer is running you can alter the delay or turn "Review Mode" on/off.


Introduction to Kanji and the Radicals

The word Kanji is the Japanese equivalent of the Chinese word hànzì, which means "Han characters". Han refers to the Han Dynasty (206BC - 220AD) and is the name given by the Chinese to themselves. Between 5,000 and 10,000 characters, or Kanji, occur in written Japanese. Kanji are built from a small number of component parts called Radicals.


The 5 Review Pages


1) Radicals Review


2) Common Kanji


3) Heisig Kanji Index


4) Jōyō Kanji


5) JLPT Kanji List



This app is based on JApp, by Bruno Azzinnari. The code for JApp can be downloaded from github: The Initial app was written in an old version of Python for Android but has now been rewritten in javascript. The security libraries linked with Python are out of date.


Courtesy of Langtech -