GPG Encryption/Signature
There is a huge lack of signature and encryption capable email clients in the AppStore when it comes to GPG/PGP.

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Léo Lego commented
I ❤️ that
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Anonymous commented
Ben, Leonardo/Kodo have mentioned it. With iPad a universal support, initial release and bugs. It might be sidelined for a while. Post about it on their Slack group and keep it fresh in their memory!
If it gets implement. It would be the first real full fledged client to have it. A good selling point.
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Ben Elijah commented
This would make my life SO much easier! It'd be a big selling point for any pgp iOS user.
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Brett Ferrell commented
Now that we have gpg support in the OSX version, will it be added to the iPhone/iPad apps? Right now I use iPGMail, but it's a little unwieldy.