Is there a convention for making notes while developing an app on android studios

I'm making an app right now and I make notes on paper about what I am doing. Sometimes it can be a log of what I have done or what I need to do. Other times I just jot down my thoughts so I can look at them and organize them. Is there a convention for including this logging process in the project in android studios? For now, I'm going to make a devlog.txt file (or a text file in a new log directory) in the app directory of the project.