Photoshop Mobile for the iPhone. It does a few things, but luckily it’s free (app store link). It’s nice to adjust your photos after you snapped them, but there’s nothing extraordinary about this app that would make it even come close to full-blown Photoshop. The difference between this app and the others like it, is that it’s free.
- Crop, rotate, flip
- Adjust exposure, saturation, tint, make B&W
- Sketch on the image, add soft focus
- Apply any of 8 filters including photo border, vignette blur, and glow
Where on the desktop you would adjust parameters with a slider, you move your finger left and right on the screen to adjust the level of blur, for example.
It looks like one of the main features involves having a Photoshop.com account to upload your images to. I haven’t bothered to create an account yet to try that. Check it out!