If you own a iOS Device and explore it's filesystem via SSH you know how it feels like to have trouble editing/viewing compressed PNG Files, Juicy PNG allows you to Decompress iOS PNG Files, and then when your done you can compress it again. It's that simple!
We are going to use a random PNG File that is compressed from the Twitter app
And as you can see i try to open it raw with with a popular image viewer program but no luck, even if i opened it with Window's default photo viewer it will just show it blank. Sadly there are not a lot of programs that can view this type of image.
HOWEVER...