Here’s a link to Adobe Photoshop on the iOS App Store.
And here’s a link to a MacStories writeup by John Voorhees, with a bit of background and hands on.
Seems clear to me that the public expects a full version of Photoshop, and will be disappointed by the limited functionality here, no matter how terrific a job Adobe’s developers did. Adobe lost control of the message early on. The MacStories piece does a great job laying all this out.