Inquiry regarding official GnuPG recommendation for Android

[陳彥佐]

Hello,

I noticed that gnupg.org currently references the Guardian Project for 
Android support. However, the Guardian Project's official page states 
that the project is unmaintained and now recommends OpenKeychain. Could 
you please clarify whether there is currently an officially supported or 
recommended GnuPG application for Android? I am specifically looking for 
a maintained solution that is available on F-Droid.

Thank you for your assistance.