How about the Bangbang writing app?

It’s pretty good. My child also took offline tutoring classes, but the results were not very good, so I signed him up for calligraphy class. Now when my child comes home every day, he writes first and then does other things. I'm very happy. The handwriting is really different from before. I wish I had encountered it earlier so I didn't have to waste money. The word stick has a patented function (patent certificate number: 5137861). Provide real-time reviews. After children practice calligraphy, they can take photos and upload them, and the system will give comments on the dynamic demonstration of voice and text. The comments will point out good strokes and bad strokes, and poor strokes will be analyzed in detail. Tell you where the length, curvature, and angle of this stroke are incorrect. Finally, put the correct stroke on the words written by the child and demonstrate it dynamically. Children can watch the comments and then practice correcting and writing. After correcting, they can take pictures and comment again. They can write and comment again and again, which is basically the same as the teacher's step-by-step guidance.