Ive tried so many todo apps and GoTasks is the only one so far that has achieved the elusive "optimal set of features", with not too many and not too few features. I use it for todo lists but also for packing lists when I travel and for trips. One of the best features is the ability to collapse parent tasks, something you cant even do on the desktop.
Its just right. A job well done by the developer.
Ipadphan about GoTasks