I'm writing my thoughts after completing both the beginner and intermediate courses and clearing all the apps you created. Quick basic grammar review is possible. However, I wouldn't recommend this to those who want to properly build grammar fundamentals or those for whom this is their first coding study. It seems good for those who have already studied similar other languages or those who have taken more detailed grammar studies from other lectures to own as a summary concept. (For example, to skim through when you can't remember specific grammar while coding) Since it's a super simple basic grammar introduction lecture, explanations may be insufficient or concepts may be hard to understand, so using ChatGPT or Gemini together would be very helpful. Many people studying grammar just watch with their eyes without actually typing, but when studying grammar, there's actually a lot to type, so at first you try to follow along typing, but later you end up studying just with your eyes and ears. The app created with this lecture allows you to follow along typing by looking at placeholders, and thanks to the biggest advantage of this lecture being simple, the amount of typing to follow along isn't much, so being able to actually type along seems good. Although it's a paid app, if you're going to own this lecture, definitely download the app and study while typing. It's good because you won't have to rummage through lectures later looking for grammar. I'm not sure if it's because the app isn't for Mac OS, but after completing writing for each stage and going back, the scroll bar goes to the very top of the app every time, so you have to scroll down again. I'm not sure if it's the same on phones or tablets. Additionally, if the app had a search function or something, it would be more useful.

@Kim Hyojung I really didn't want to learn things all jumbled up and chaotic... This really suits someone like me perfectly. Without complicated explanations, you taught step by step, so it wasn't difficult at all and I could follow through to the end. It's great that I can look things up on the app even after finishing.