You will need to sign into Dropbox first by tapping on the Dropbox button at the top of the display.

You must first save a document to your device before you can move it to iCloud or copy it to Dropbox. Tap the '+' button in the upper-right corner to create a new document. On the iPhone, the app does not rotate into landscape mode, which provides a wider keyboard for faster text entry. On iOS devices, Password Pad is a universal app designed for both iPhone and iPad, but it works better on the iPad. When you create a new file, you'll be asked to give it a password. On a Mac, Password Pad Lite looks like a simple text editor. There is but one iOS version of the app it costs $1.99 and uses Triple DES encryption. I tried out the Lite version because all I am trying to do is keep Christmas lists and the like from my curious or nefarious children. Password Pad Lite is free and supports XOR encryption, which the app itself admits 'might be easily cracked.' The $4.99 Password Pad app supplies stronger Triple DES encryption.

There are free and paid versions of Password Pad in the Mac App Store.

If you'd like to keep some of your files from prying eyes, Password Pad lets you create text documents and protect them with either XOR encryption or Triple DES encryption and share them via e-mail, iCloud, Dropbox, or iTunes file sharing.

Password protect file on mac