Pretty good but...

So far, I have used this app for a few days and I have learned a lot already, it is well paced. Sometimes it is difficult to understand with all the different colors of font. There is one glitch that I have noticed, in chapter two, whenever I click on a lesson, it gives me the lesson after it so if I click on lesson 02-01 it will give me 02-02, so I can not access the first lesson in that chapter and whenever I click on the last lesson, (which is a quiz) it lags and I have to restart the app. So it is asking me to either pay or share to unlock chapter 3 since a little while before I went back into lesson 1 while I still could and went back so it was marked as unfinished so I cant unlock it for free.

2037292739228 about Swifty: Learn to code tutorials for Swift, v1.8.1