IF you have any PROBLEM with in-app-purchase, contact developer at fuwafuwa@fastmail.jp. Please don't write negative review, as all of the in-app-purchase "bugs" were caused by misunderstanding.
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The most comprehensive app for JLPT preparation, integrating vocabulary, grammar, and example sentence. Using Spaced Repetition System (SRS) for effective memorization, complemented with Cram method for quick review and relaxed memorization.

Distinctive features (not available on other apps):
- 17.000+ selected example sentences, adapted to the words' meaning, context and difficulty (available as in-app-purchase).
- Furigana (reading guide) on top of each kanji. Can be configured to show furigana with certain JLPT level only.

Contents: (5% of the content is free for trial)
KOTOBA (Example sentence packages are sold separately)
BJT - 884 words
N1 - 3469 words
N2 - 1833 words
N3 - 1797 words
N4 - 634 words
N5 - 669 words

KANJI
N1 - 1076 kanji
N2 - 415 kanji
N3 - 361 kanji
N4 - 181 kanji
N5 - 103 kanji
Jouyou 1 - 80 kanji
Jouyou 2 - 160 kanji
Jouyou 3 - 200 kanji
Jouyou 4 - 200 kanji
Jouyou 5 - 185 kanji
Jouyou 6 - 181 kanji
Jouyou 7 - 1130 kanji
Jouyou 8 (person name) - 772 kanji
Jouyou 9 (rare) - 324 kanji

BUNPOU (Example sentences included)
N1 - 71 grammars
N2 - 63 grammars
N3 - 63 grammars
N4 - 49 grammars
N5 - 40 grammars

REIBUN
Bunpou N1 - 136 sentences
Bunpou N2 - 119 sentences
Bunpou N3 - 123 sentences
Bunpou N4 - 94 sentences
Bunpou N5 - 79 sentences
BJT - 1235 sentences
Kotoba N1 - 6564 sentences
Kotoba N2 - 3457 sentences
Kotoba N3 - 3579 sentences
Kotoba N4 - 1250 sentences
Kotoba N5 - 1310 sentences

Others: (Example sentences included)
Giseigo - 111 words
Gitaigo - 189 words
Giseigo - 124 sentences
Gitaigo - 403 sentences
Kotowaza - 387 proverbs

ATTENTION
The UI may be confusing at the beginning, but later you will be familiar with it. All of in-app-purchase problems are caused by this confusion. Please check the video tutorial at http://juku.fuwafuwa.info/