Read GnuPG encrypted emails transperently on iOS

Are there any tools that integrate OpenPGP/GnuPG with the mail reader on iOS

I've heard that iPGMail and oPenGP, probably SecuMail too, all require that you copy & paste an encrypted email into the application, which sounds obnoxious. Any of these tools managed to actually integrate with iOS's mail reader the way GPGTools does on OS X yet?

Yes, I'm aware Apple's Mail readers support S/MIME, but that's less secure in practice.