Quick – guess what the “Multiple Attachments” App does. Correctamundo! It lets you add multiple attachments to an email on iOS.
The app is absurdly simple. You just send it as many documents and pictures as you like via the standard “Open In…” dialog that’s part of every app on iOS. Then, when you’re ready to send, hop back to Multiple Attachments and send the mail from there. Because it uses the standard mail-sending sheet, you don’t need to do any configuration, and sent mails will end up in your regular “sent mail” folder.
Like I said – super simple, and because of that it’s super useful. The app is Universal, and currently costs $2 on the App Store.