First of all, ads are annoying and secondly everytime I want to undo, it changes all the formate of my notes. The color, the font, the size, everything!!!! It's super annoying and I wouldn't recommend. The developers need to figure out a way to fix all the problems because people saying it's easy to use are so wrong. I waste so much of my time to redo everything. And if you think "Dude just press redo and everything will be back to normal." NOT EVEN!!! It makes everything even worst than before.