Recently I mentioned a couple of command line tools for automatically taking and framing screenshots.
Here’s an app submitted by Mayank Sanganeria that allows you to customize your screenshots quickly on your iPhone called the Screenshot App, the app is free although there could be in-app purchases in the future.
The Screenshot App provides a set of iPhone templates, with device frames, and you simply pick the template you like, add a title and description with the fonts and colors of your choosing. You can then save the completed image to the camera roll or to Dropbox. The screenshots can be exported to all sizes, and you can save your setup as a draft in case you want to make a series of similar screenshots.
You can find Screenshot App on iTunes here.
A nice tool for quickly customizing iPhone screenshots on your iPhone.