I am using this product more than a year now. It can make zip, rar etc. archeived files and also open them. I have tested few other app like this but this one is the fastest. You can unzip very big file like 3gb in it without much of a problem. Ofcourse your mobile has to have the the processing power to support it too. It also serves as a good file maneger so you get two things at one place. It has the the password protection feature for archeives too. However you should not try to unpack any .tgz file with it. Love it.