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Re:After self-hosting my email for twenty-three years I have... by dredmorbius on Monday September 05, 2022 @06:14AM (#32722577)
K-9 Mail is an app available for Android which supports PGP (if clunkily).

<https://k9mail.app/>

I'm not going to remotely pretend that this would make PGP attractive or viable for the greater public. I do want to address your valid point that the general-purpose computer seems to be a dying breed, but that there are still options for mobile devices.

I've used K-9 Mail, though rarely do these days (it went poorly-maintained for a while).

There seem to be some options for iOS as well, such as iPG Mail, though I've no experience at all with it.

<https://www.openpgp.org/software/ipgmail/>

Re:After self-hosting my email for twenty-three years I have... by sneak on Monday September 05, 2022 @07:15AM (#32723044)
Most of my friends and family don't have Android devices.
Re:After self-hosting my email for twenty-three years I have... by dredmorbius on Monday September 05, 2022 @07:48PM (#32730835)
Perhaps you might care to share with us what types of devices they do have, seeing as my mental telepathy transgizmatron happens to be in the shop presently.

Note that I also listed an iOS option, and mentioned that there are others.

Again: PGP-enabled email apps are available on many platforms, though, again, this addresses only a small part of the larger challenge at encouraging adoption.