Adobe has updated Photoshop Express for iOS adding new optional add-ons alongside several sharing and editing improvements. Adobe Photoshop Express 2.5 adds the ability to share photos on Tumblr as well as native iOS 5 Twitter integration and improves Facebook and Flickr sharing by allowing users to share to specific albums and choose photo sizes before sharing. The new version also now allows users to easily compare original and edited photos, zoom in while editing, preview borders and effects and adds new controls for Hue, Brightness and White Balance. A new Effects Pack is also now available as an in-app purchase for $3 and the update adds 18 new borders to the $2 Border Pack add-on introduced in February, bringing the total number of borders to 40. The new version also adds support for the iPad Retina Display. Adobe Photoshop Express 2.5 is a universal app requiring iOS 4.2 or later and is available from the App Store as a free download.