There's an app that goes perfect with this course called: Visions - An Idea Log Based on Y Combinator. It's based directly on a project from this course. Check it out: http://www.getvisionsapp.com
This is actually a great app.
Reminds me of how Blake Masters took Peter Thiels notes and ended up writing a book with him.
Does it upload your curated ideas to the cloud?
At the moment, there is no cloud support so all of your ideas are saved locally on your device. If you want to export your ideas out of the app, you can do that.
Is there a feature you would really like in this app? Is it iCloud backup?