2,135 kanji. 2,135 stories to remember them by.

Instead of a cold progress bar, Kanzen shows you a mountain to climb, with a marker at each level. It’s motivating, and you can actually see how far you’ve come.

A small treat: the Fuji image changes quietly with the time of day. The morning session doesn’t look like the evening one.

It’s called spaced repetition: the app works out the best moment to show you each kanji again. The better you know it, the less often it asks. The result: you review less but remember more — and there’s nothing to set up, Kanzen handles it.

For each kanji, it tracks three things separately: its meaning, its pronunciation, and the words it appears in. You start with the meaning; the readings unlock once it’s solid, then the vocabulary — like steps on a staircase. No other app keeps these three memories apart.

Under the hood: FSRS, the most researched memory algorithm around — with nothing to configure, Kanzen handles it all.

In the Dōjō (the app’s practice space), you can challenge another learner to a duel, or practice solo with small games: telling apart kanji that look alike (like 末 and 未), or sorting words by their pronunciation.

A duel is ten fifteen-second rounds, each player on their own schedule, with 48 hours to finish. Seven yokai leagues — from Tanuki to Kami — rank you by real progress, not by how often you show up.

It’s not just for fun: you remember far better what you’ve handled in a game than what you’ve only re-read.