The iPhone is, officially, King of Design: when even Intel is mirroring your new roundrect bezels, you have won that particular game.
2011 — Matt Neuburg, Programming iOS 4: Fundamentals of iPhone, iPad, and iPod Touch Development, O'Reilly Media (2011), ↑ISBN, page 512:
In this example of a UITableViewCellStyleDefault cell, I shrink the image and center it in the image view, supply a gray gradient as the cell's background, and put a roundrect border around the cell (Figure 21-3): […]
2011 — Mastering Photoshop for Web Designers, Volume 2, Smashing Media GmbH (2011), ↑ISBN, page 10:
Experienced Photoshop users will probably already know one or two ways to draw a roundrect.