Currently, the maximum number or favorites is set to 75. The maximum number of blocks is also set to 75. 

With the purchase of a GROWLr PRO Membership, your maximum number of favorites will increase by 200, and your number of blocks will increase by 500!

Controlling your blocks is super easy.

From GROWLr's main menu, tap the Galleries icon.

Scroll to the bottom of the gallery list to find your Blocked gallery.

You can control your blocks from this gallery.