Flickr getting into the act, will offer 12 photo filters with newly re-designed app for the Apple iPhone
New filters for the Apple iPhone version of the Flickr app
The app is free on the Apple App Store, but those using the Apple iPad need to be warned. There is no version released that is optimized for the Apple iPad, at least for now. The redesigned app has a easier sign-up and registration process and now offers full Groups capabilities.
The filters battle is now on between Instagram, Twitter and now Flickr (iPhone only).
source: Flickr via BGR