What do you do when you want to re-solve a reference book that is already messy with graffiti?
Want to easily solve problems on the bus, subway, or on the go?
Are there any terms or concepts that are difficult to memorize?

Full support from formulas and symbols to Korean and English!
From now on, solve it with a single note!

◈ Register a problem
1. Take a picture of the problem with the camera
2. Enter the answer to the question
3. You can try solving problems in the app!

◈ PDF, Word workbook output
→ You can print the problem to PDF or Word!
→ Print the questions as PDF and make your own workbook.

◈ Until you fully understand the problem with the learning status
1. Not learning: This is a problem that has not been learned yet. Start learning.
2. Frequently Wrong Problem: This is the type of problem that I am vulnerable to. You can practice over and over again.
3. Learning completed: Congratulations. You completely understand the problem!