I love coding apps because they make students think, reason and problem solve. Obviously it is a big jump from playing a coding game to creating an app or a website, but the thinking process is the same.
Here is a list of a few I have tried--linked to iTunes. Some of these require no reading at all, and some get quite challenging for older elementary students. (And all of these are FREE!)
Early Elementary (no reading)
Middle elementary (limited reading)
Are there any apps that you've used that aren't on my list? Comment below!