There is a few terabytes of media, predominantly pictures, on a debian device. They can be accessed with smb (samba) or ssh (sftp, sshfs). I would like to be able to view these media items on Android and iOS and share them by email, Skype, WhatsApp, and GNU Jami.
I tried Kodi and it is a good viewer, but does not have a share button.
Looking for libre solutions ONLY, such as those from f-droid. I just couldn't find a suitable app there. I wouldn't want proprietary mobile apps to have access to my computer.