Tumbler is micro blogging site where you can share almost everything with pictures. You can create your account by logging in through your email id and password. Once you sign in.
You can get gifs, images, other tumbler ( blogs) , pictures. At once.
You can share your blog through other of your blog friends through Facebook, email.
Your blog can have just wordings, pictures, videos, audios, gigs.
The only I have been through is the consumption of the data. It consume much. And takes time in loading. On the other you have instagram with almost same concept but it can run over less speed too.
If you login Tumblr through browser it consumes less but after few results it says to download Tumblr.
The content of the Tumblr is knowledge full and you can write as much as you want. No restriction.
Userfriendly since it helps in searching anything you want and user friendly.
It takes time in loading. I hope they make it a bit faster and I usually don’t find its update frequently in compare to other apps.