Last year I had a great little app on my android tablet, it was a christmas organiser that let me make lists and then make sub lists within the lists. For example, I was doing a christmas craft advent box, every day had a craft, and within that craft I could list all the supplies I needed to get, and tick each item off individually when they were done.
I'd love one like this for the iPhone/iPad, but when I search the app store all I can find are Christmas gift list organisers! Gah!
Anyone have any ideas? Am I searching for the wrong thing? 
TIA.