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
Sunlight looks white, but it is really a gathering of many colors.
Light has the power to travel straight like a wave our eyes cannot see.
Blue light has short waves, while red light has long waves.
Tiny particles in the air bounce back short-wave light very well.
That is why the daytime sky looks blue all over.
In the evening light comes from far away through the air, so only the red color remains.
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.