A common question when learning to write Japanese by hand: do I practice on my phone or on paper? The short answer is that each one solves a different part, and the most practical approach is to combine them.
What paper gives you
- Control of proportion. On paper you see the whole character, its balance and the space between strokes. That matters most for kanji with many strokes.
- Hand movement and pressure. Stroke endings (stopping, lifting, sweeping) are learned with a pencil or pen.
- No distractions, and a visible record of your progress.
Its limit: nobody tells you whether the order or direction of a stroke is right. If you get it wrong, you repeat the mistake without knowing.
What the phone gives you
- Immediate correction. An app with stroke recognition can tell you right away that the order or direction is wrong.
- Short sessions at any moment: on the commute, during a break.
- Spaced review and daily challenges, with nothing to prepare.
Its limit: the screen is small, there is no paper friction, and tracing with a finger is not identical to using a pen.
What the research says
There is evidence that handwriting helps you remember characters better than typing (a small study by Longcamp and colleagues in Human Movement Science, with 12 adults; here is the summary). What we have not found is a study that directly compares tracing with a finger on a screen against writing on paper, so we will not claim that one is better than the other.
A combined routine
- On your phone: trace the character with order and direction correction, in sessions of 5 to 10 minutes.
- On paper: write from memory the characters from that session and watch the proportions. A squared notebook helps.
- The next day: review yesterday’s characters on the phone before adding new ones.
It is the same “look, trace, write from memory” logic we describe in how to learn hiragana by writing.
How Kaku! fits
Kaku! is built for the phone side: you trace with your finger and the app checks the order and direction of each stroke. For paper, use the same characters and write from memory. And if you wonder whether you need handwriting for the exam, see JLPT N5 and handwriting.