OpenKeychain is an open-source Android app that implements the OpenPGP standard, enabling secure encryption, decryption, signing, and verification of data. Compatible with tools like K-9 Mail, it simplifies cryptographic key management and secure communications. Learn more at openkeychain.org.
Discussion
It's good for PGP on Android, but, it's not being actively maintained. I think my only problem was exporting the private key into other software.
Thanks, but I'm looking for something like a multi-tool app. OpenKeychain is specific to PGP.
Something like this:
https://play.google.com/store/apps/details?id=com.nitramite.cryptography
or this:
https://play.google.com/store/apps/details?id=com.kokoschka.michael.crypto
But none of those are really open source AFAICT
There is little demand for such solutions. This is a pity. It is true that OpenKeychain is not actively maintained, but for now it works for me for the uses I put it to, which are mainly to encrypt e-mail communications.