I use LectureNotes as well, and I highly recommend it. It's especially good on the Samsung Galaxy Note 10.1 because it has good support for the built-in pen (the S-Pen). Unlike a capacitive pen (like on an iPad), the S-Pen is active, with a very fine stylus, allowing for very precise lines and drawings. I use the pen in LectureNotes to create hand-written notes, not just for bible study or sermon, but for other note-taking situations as well (like meetings in church, etc.)