500px continues to grow in popularity as a photography sharing and discovery site, and today's release of its official iPhone app should only help that momentum. Previously available only on iPad, the free app brings the ability to browse 500px's galleries of often stunning user- and editor-curated photos to Apple's smaller devices, with support for the 4" screens of the iPhone 5 and latest-generation iPod touch.
While you can use the app to browse and rate images submitted by users and follow friends' updates, the app stops short of letting you upload your own photos from your device. That functionality still requires visiting the 500px website in a browser. Still, the standalone app is nevertheless a slick way to
