I purchased Logos 2.1g in 1998 (if I remember right) and have been using and building on it regularly for more than 20 years! Now, I seem to be spending a fair amount of time on my iPad, and suddenly what I thought was a complete product seems to be missing something. I know it would be harder technically, but I would love the ability to use my Apple Pencil or finger to mark things up FREEHAND. In paper books I will frequently circle words and draw a line connecting them, for example, to show how things tie together. I would so love to be able to do that on my iPad! I think I spent $1500 on my initial purchase and have added to it little by little through the years, but haven't seen new things sufficient for me to contribute much more to you financially. This is one I would gladly pay for!