KanjiSchool
Drag the slider. No other reader does this — and you should see it working, not read about it.
Tap any kanji for its meaning
When black clouds appear in the summer sky, lightning occurs.
Inside the clouds, ice particles bump into each other and electricity builds up.
The stored electricity turns into light and runs across the sky.
Light is faster than sound, so we see the flash first.
The time between the flash and the thunder tells us the distance.
When you hear thunder, go into a building right away to protect yourself.
Pick the hardest line you can still read. 20 seconds, no account needed.
Because that is how Japanese children learn to read. Japan's Ministry of Education fixes exactly which character belongs to which grade — so "grade 3" is a boundary you can verify, not a feeling. Every article here is machine-checked: if a single character sits above its grade, it is not published.
The result: you never hit a character you have not learned. That is the whole reason this product exists.
One article at the level you picked, sent at 7:00. No account needed. One tap to stop.