I know that everyone has been waiting a long time for sync and I want to reassure you that it is high on our list of priorities. As users of Squid ourselves, it’s something we really want as well! We appreciate your patience.
This is something we’ve been investigating since the app’s inception and we continue to investigate constantly. Syncing is a very difficult problem to solve, especially with regards to handwritten notes which can be combined with images and text and contain backgrounds from multiple PDFs. I don’t have an ETA for when sync will be supported, but rest assured this is a high priority for us. We appreciate everyone’s feedback on this idea.Asim D commented
Have to add my opinion to everyone else: S Note may not be ideal, but at least it offers free sync across all your devices via Samsung Account. It is great that I can back up to Dropbox, but real SYNC needs to be implemented - even if it is an added IAP.
Right now, the only way to do "sync" is to go to Device 1, do a backup, then go to Device 2 and do a "restore database" from the backup you just created from Device 1. However, if you have a new note on Device 1, and you added a new note to Device 2, then this is impossible, because you'll lose one note.