There is already an official Tumblr app available in store. But the app is not popular and user friendly. We always search for some good & useful apps for our readers. Today we found a Universal Tumblr app named Ouga. It has many good features and a good user interface
Joe Belfiore tweeted about official "Tumblr" app's arrival for Windows Phone saying "One week left in April, let's try to finish it strong". May be more juice is left for this last week of April then :).
For now, Tumblr has already hit the Windows Phone store and you can install the free