What I got out of your post is that the journey matters, not each individual app. If someone strives to make 400 apps that will make $400/month he will learn a

What I got out of your post is that the journey matters, not each individual app. If someone strives to make 400 apps that will make $400/month he will learn a ton along the way and be forced not to fall in love with one idea. When people fall in love with an idea they stop trying other things. Using this approach you can reflect on all the different little projects you worked on and then pick out different ones where getting the $1/day was easier than for others.