I joined Allen School a month after starting a boot camp with no base. I started with the expectation that I could learn everything from the basics at the boot camp, but it is difficult to cover basic grammar in depth due to the nature of the boot camp. I was frustrated because I didn't know what to ask, how to review and study, and it wasn't just about memorizing, and I felt like the content I studied wasn't mine. In my case, it was a desperate choice to complete the long boot camp course. There were so many people who were doing the boot camp, and there were so many who had already done it, and there were even many who were working in the field. I think that means that they cover the necessary knowledge that iOS developers need to know well. I think it's a huge advantage that Allen, who was a senior who had experienced everything himself, took care of everything during the middle of studying, even when I was stuck, anxious, or worried. When you listen to the lecture, you can't take it easy(?) because it's an online lecture because the amount of study is so vast. Of course, it is not a simple lecture, with the community and weekly live lectures. Even after the course ends, there is a community where all the students can communicate, and I continue to study by asking questions and communicating with Alan. Those who are just starting out with iOS and those who are having a hard time will naturally listen, and those who have already studied for a long time and are working in the field also listen, so it seems to have become a must-have course for those who are doing iOS.