You can download the app directly on your device through the Windows Phone Store or by using the link which follows:
Exclusive functionality to Windows Phone users include the ability to have Tumblr display the latest images in your feed on your lockscreen or through the app's live tile.
Tumblr for Windows Phone has the following features:
- Find and follow the things you love
- Share photos, gifs, video, quotes, chats, links, and text
- Jump between your dashboard and Explore with just one swipe
- Display the latest images from your dashboard on your lock screen and live tile
- GIFs play as you scroll