The only app for this thing that was compatible with my iPhone (all others required an iPad) was info.Graphics. My first impression? Pretty visuals, but SO MUCH CLUNK! I first navigated to the categories page, where I was greeted by a misspelling of the word 'developed' (developped). Upon selecting a category, nothing happened -- no visual acknowledgment of any kind that I had made a selection, until eventually, more than five seconds later (which feels like eternity on a mobile device), the screen changed to show infographics in that category. However, as I proceeded to scroll down the page with my category results, pop-up messages asking me to "please wait" appeared constantly. The number of total results, perhaps a dozen, was also a let-down, especially after all the patience required.
I'm kind of intrigued by several of the other apps that were iPad-only, so there's a small chance I'll download and play with one of those at home.