By 
Tumblr fans will be pleased to learn that a new upgrade has been submitted to the Google Play Store. Alongside the usual smattering of bug fixes and enhancements, you can expect to find improved notifications; the ability to sign up for Tumblr directly through the app when receiving a recommendation from a friend; find new Tumblr blogs to follow through your phone contacts and Facebook friends; the ability to access new sharing options when holding down the “Like” button and more. As always, this app can be had for free and can be found in the Google Play Store, so get to it.
Not compatible with Nexus 7?
Yeah Tablets have never been supported. Its why I found ShortBlogger go maybe not the best but it worked for me on both phone and both Asus Transformers.
The site works way better than the app, why bother.
Still app blows Shortblogger my daily driver til things get finished. Tumblr takes too long for even bug updates.