LearnObit is a try to build an Integrated Learning Environment that could be used in general. The current implementation as a small entry point for that goal is to combine Spaced Repetition which is the old algorithm for learning with the tree-structured note-taking tool to make this algorithm popularly adopted finally.

So what LearnObit does now is that when a user notes-taking through the tree-structure, it makes that manageable as knowledge through Spaced Repetition algorithm. It's like Anki + Workflowy.