Over the past little while I've been keeping my eye on an app called Picture Elements. It's a 500px client that taps into the photo sharing service and offers a wide array of functions for the site including viewing, sharing, and searching for photos. The app started off as a simple viewer but has since grown into a full blown Built for BlackBerry app that supports logging into your 500px account, adding favorites, comments and most recently, photo uploads direct from your BlackBerry 10 smartphone.
With no sign of an official 500px, I'm not sure one is really needed as long as Picture Elements exists. The developer behind Picture Elements, Forty-Two Apps, has always been open to feedback and feature additions where it's possible to improve the app. If you're a 500px user and looking to access the site on the go, then Picture Elements is certainly worth a look. You can grab Picture Elements from BlackBerry World right now for $.99 and it's available on the BlackBerry Z10, BlackBerry Q10 and finally, the BlackBerry Q5.
I should note though for those looking to download the app that you cannot download images using Picture Elements. 500px is a site that allows photographers to sell their photos and all the content belongs to those photographers. While the official app does allow for downloading of images after purchasing, Picture Elements has no intent on adding that function due to the need of implementing transaction functions. In short, don't leave a bad review saying you can't download images to use as wallpapers - that's not why Picture Elements was created.