I have been using the Evernote [1] for years (since 2015 I think) both.
Their paid service because it synchronised well both on my Ubuntu Touch
phone (and with the UT tablet, too) and with my PowerBook G4. It also
worked with some Linux clients.
I no longer use any of these devices frequently but I have kept the
paid "pro" service until now.
But this year all of the devices stopped to work. Even the OS X
Evernote does not sync.
So it seems than now is the right time to depart...