Kanjidon – Kanji cards with JLPT study paths using spaced repetition

Summary: Kanjidon offers kanji flashcards and JLPT study paths powered by the SM-2 spaced repetition algorithm to optimize review timing for better retention.

What it does

Kanjidon uses the SM-2 algorithm to schedule kanji reviews, showing easy characters less frequently and difficult ones more often.

Who it's for

It is designed for Japanese learners preparing for the JLPT or studying kanji efficiently.

Why it matters

It improves retention by timing reviews to match individual learning needs, reducing study effort.