The best outliner
Update: AWESOME iOS 7 look. I enjoy using it even more!
It has earned a spot on my iPhones home page for years now. I use it on a daily basis.
Not only for todos but also for lists, trips, ideas. So many things.
I have bought other outliners and todo apps, but the brilliance and ease of this program keeps me coming back to it.
It has sync via Dropbox and an online web version too.
Highly highly recommended!
O.o about
Outliner