Skritter
Handwriting SRS that grades every stroke as you write characters from memory.
What it actually is
You write characters with a finger or stylus and it marks stroke order and shape in real time, scheduling reviews so you actually retain them; it ships with HSK, Integrated Chinese and other textbook lists. Only Chinese and Japanese are supported, which is why it is here rather than in the general tools. Roughly $15/month or $100/year after a 7-day trial, and it is worth it only if handwriting is genuinely one of your goals — many learners reasonably skip production of characters entirely.
What it covers
- Writing
- Reading
- Vocabulary