I recently went back to school to get a BA and was looking for a note taking app that could sync between my iPad Pro, MacBook Air, and google pixel, and that would allow me to use my Apple Pencil to write written notes. That request is a tall order, so I was excited when I stumbled upon Notdex. Unfortunately, NoteDexIndexCardsMemoryApp is too good to be true. It is slow, it lags, and the hand writing functionality is barely usable because of how laggy it is. I had to close NoteDexIndexCardsMemoryApp out and open it back up three times trying to write one note card because the darn thing kept freezing. Additionally, the UI is clunky and the graphics low quality. If the developer is able to address these concerns, thus app would be stellar and absolutely worth the cost. As it stands, though, I would pass on this one.