Features
Adaptive SRS, tuned for kanji.
The Smart Review System schedules each kanji review based on how confidently you recalled the last one. Items you almost forgot come back sooner. Items you know solidly come back later. The schedule adapts to you — not the other way around.
Four responses. One sustained review loop.
After every review, you answer with one of four buttons. The algorithm uses your answer to set the next interval — and adjusts a per-kanji difficulty factor that compounds over time.
You blanked. The card comes back almost immediately.
You got it, but barely. The interval shrinks.
You recalled it correctly. Interval expands per the schedule.
Too easy. Interval expands faster than Good.
Why a generic SRS isn't enough
Generic flashcard SRS tools (Anki, Mnemosyne, SuperMemo) treat every card the same: meaning, reading, image, definition. Kanji review has multiple recall paths — meaning, on'yomi reading, kun'yomi reading, stroke order, and recognition in context — and failing on one doesn't mean failing on all.
KanjiKanji Modern's SRS tracks recall confidence per kanji and applies kanji-specific behaviors: leech detection for items you keep failing, interleaving so similar kanji aren't reviewed back-to-back, and Smart Review which surfaces items you're ready for, not just due.
Smart Review targets items when you're ready for them, not when an arbitrary calendar says they're due. Combined with weak-point identification, it reduces the daily review pile without sacrificing retention.
Deeper dive: What is spaced repetition? · Compare: vs. Anki · vs. WaniKani
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