VocaBuilder Jp-Eng Pro

VocaBuilder Jp-Eng Pro is a multiple choice quiz app for study Japanese (with Hiragana and Roman character) and English words.
There are 3000 words and 7 categories in this app.

[categories]
Business 536 words.
Daily Life 680 words.
Science 268 words.
Travel 572 words.
General 522 words.
Economy 185 words.
Nature 237 words.

[Basic functions]
Multiple choice and two-way quiz between English and Japanese.
Reference function.
Score history function.
Color select function.

[Pro version functions]
3000 words and 7 categories.
All Japanese contain Hiragana and Roman character.
Organized word from A to Z in Reference function.
Save and display total score function. (For each category.)
Suspend function. (You can resume the test where you left off.)
Sound function for English word. (by Android text to speech engine.)
10 color select features.