Since the verses are great many in number and bookmarks are the primary source to collect and study them. A single bookmark folder is not sufficient. What I mean is if a folder such as fiqh is created. Now fiqh can be further broken down into smaller folders. Therefore I suggest that you allow people the ability to create nested folders with parent folders and as many child folders as the user wishes. It could look like this a person creates the folder fiqh. He then creates another folder under the umbrella of fiqh such as Salah. He then creates another folder in the umbrella of Salah such as benefits of salah. And so on this way verses categorization would be so much more intuitive and easily manageable. Such that if a person wanted to locate a particular ayah in the future all he had to do was to track down all the bookmark folders one by one. Please think about this feature as this is the most logical conclusion I have come to inorder to study the verses and to retain that knowledge. Please implement the same feature for the computer application as well and allow us the ability to transfer all out bookmarks between android and computer application back and forth.