So good I bought the full version.

Iphone 6 with iOS 8.1 - Ive tried LOTS of ftp apps. Not only is this the only one that does exactly what I need it to do, but its easy to use, it has good file management built into it, when playing music it doesnt stop when you leave the app, and it allows you to password protect the app. Very much well worth the money.

eminuss about FTPManager - FTP, SFTP client