Pixel Art editor

This app misses copy/paste while an other app has copy/paste but it has ads all over the place. I also find it very annoying is that there is no "redo" button because if I accidentally touch the undo button, I lose the last move I made. This happens when I try to touch the move button. And there should also be a pallet! Why do I have to jump from image to image selecting colors? It's so inconvenient! I know this was made in 2011 but now it's 2014 and I think phone standards are a bit more higher!