There are 1,006 kanji developed and maintained by the Japanese Ministry of Education and all Japanese school children should learn those kanji.
The kanji Reviewer app is the best solution to learn Japanese because, the user can review, remember and learn a lot of Chinese characters quickly.
The number of kanji by grade in Japanese school:
First grade (80 kanji)
Second grade (160 kanji)
Third grade (200 kanji)
Fourth grade (200 kanji)
Fifth grade (185 kanji)
Sixth grade (181 kanji)
The aim of all the Kanji Reviewer apps is to review and remember all the 1,006 kanji which is the most difficult part of Japanese language for a foreign student. This is not a dictionary app so, the user of this app will not get all the meaning of a single kanji. But, this app will show the most commonly use of a kanji.
For example, the meaning of the kanji 中(なか, naka) is "inside" and the meaning of the kanji 中央(ちゅうおう, chūō) is "central". So, when the user press the button [中] then the result will be as shown below:
1. 中(なか, naka)=inside
2. 中.央(ちゅう.おう, chū.ō)=central
The Kanji Reviewer app is developed by a foreign student Ferdous Hasan, who is studying software engineering at Tokyo University of Technology (CS学部、東京工科大学) and he things that, this app is a painless way to remember all the 1,006 kanji as soon as possible.