This is really a great post. I looked at a couple of the apps; I'll have to go through and check out some more later.
I really like the message though, just get started. It's the same with writing. I think a lot of people never write their book because they feel like it has to be THE book, the book to end all books, no one will need to read again after reading this book... No, that doesn't exist, just create something.
It makes perfect sense to people that they would have to practice throwing a basketball, but they still think their creative work has to be perfect the first time, every time.