Tumblr for iOS devices got a huge update. It is now at version 2.0, and has a completely new interface making it a lot easier to blog from multiple accounts. The new UI also helps you easier browse the blogs you follow, create new blogposts and manage multiple blog accounts. In the previous version of Tumblr, there were two navigation options, Post and Dashboard, from which you had to click multiple times to get to where you wanted to go. However now, almost everything is presented at the surface. It's formatted a lot like Instagram with the navigation bar at the bottom of the screen.
Note the Instagram like layout and importing phone contacts
Also, previously, to manage multiple blogs, you had to go to Advanced Options within a post to choose which blog you wanted to publish to. You also had to choose Advanced Options to save as draft. Now, when you hit post, you'll be presented with a list of your blogs and you tap on whichever one you want. And you swipe now, to save as draft.
Version 2.0 also allows new Tumblr users to sign up from within the app. Users can read and reply to messages, as well as find users via their phone's address book. The Tumblr app for iOS is free and is available from the iOS App Store.