I took several lectures to learn Flutter. Most of the lectures said that I could make some apps with Flutter, but I felt that something was lacking... Suddenly, I watched the basic lecture of 'Devstory' and got a feel for Flutter, and I took the practical lecture too... It was as expected.~~~ ^^ Logical and clean explanation! A huge and detailed preparation material for Flutter! (Please give me a book with the materials you prepared...^^) Design system and MVVM refactoring were especially good...^^ I highly recommend it to those who want to learn Flutter properly. Great lecture! Thank you, Devstory...^^