1) Let me work with custom fonts

2) Let me import images and cut them and place them

3) Export the whole thing as pdf

(Bonus points for handling svg and clip art)

I have not found one that does. I didn't try Pages - I assume it's a word processing app like Word and not a page layout/design/typesetting app like In-Design.

Have you tried it? Does it let me do these things?

I've often toyed with the idea of writing it myself. But I stop at point (1) because loading custom fonts that don't ship as part of the app bundle doesn't seem to be supported by iOS. (And also because I tend to procrastinate)