Secure Folder: Lock Documents

Secure Folder is a great option to save every kind of file you have on your iPhone. With this app, you can move pictures to the folder, or take pictures that immediately go to the secure folder.

You can also save files from an extensive list of formats, and it also offers a file management system so you can rename, move, or cut your files within the app.

Not only that but it also supports some Cloud Storage systems, like Dropbox and Google Drive. You can save your files, upload them to the Cloud or email them if you want.

Keep in mind though, you must remember your password at all times. If you forget it, there’s no way for you to recover it.