The service team is already working on solving the problem.
Here’s how to get the Tumblr app back on your phone. Open the App Store > click on your profile picture or initials on the top right hand corner > click purchased > search for tumblr > click on the “cloud and arrow” icon to install #tumblr
— diego veronica (@diegoveronicat) November 16, 2018
According to the assumptions of some users, the application was removed due to the presence of inappropriate content. NSFW (Not safe / suitable for work) and adult-content, which implies porn and obscene language, is allowed in Tumblr.
The service team said they know about the problem and are working to fix it. However, Tumblr did not explain what caused the removal of the application.
Our team is still working on the issue with the iOS app. We’ll let you know the minute everything’s fixed. You can watch for updates on our help center: https://t.co/UpXr7j2VJf
— Tumblr Support (@Tumblrsupport) November 17, 2018