Tumblr today updated its iOS app to version 3.3, adding a redesigned camera interface that simplifies in-app photo taking and integrated Photoset capabilities. Previously released as part of a standalone app, the new Photoset feature allows users to create photo collages with customized layouts. Tumblr has also been updated with the ability to double tap posts to like them, easy one-tap avatar changes, and new URL linking functionality.Brand new camera! Create photosets straight from the app. Double-tap posts to like! Tap the avatar in your profile to change it. Link posts: Copy or enter a URL and we'll fetch the title!