Multiple copy paste app for ios

Check this: http://jumpcut.sourceforge.net/

Cited from the above:

Jumpcut is an application that provides "clipboard buffering" — that is, access to text that you've cut or copied, even if you've subsequently cut or copied something else. The goal of Jumpcut's interface is to provide quick, natural, intuitive access to your clipboard's history.

I use FlyCut, you can do Cmd-Shift-V and then cycle through your recently copied texts with arrow keys.