iOS: VSCO Cam, one of the best apps for photography, was just updated with a bunch of new features, including a new iPad version, filter comparison, syncing across devices and a new journal mode.
The iPad version is a lot like the iPhone version, except on the bigger screen. This makes it possible to do photo editing on a bigger screen. Whatever you do on the iPad version is synced up to the iPhone version as well. Journal is a place to publically share photo essays with multiple images and a bit of text. The camera itself gets some improvements as well, including a new manual focus, shutter speed, white balance and exposure compensation. It's a pretty hefty update with a lot of new stuff, and it's available right now.
VSCO Cam (free) [iTunes App Store]