A really nice summary. Very useful. Thanks!

That’s a lot of partners…

It has swipe up/down + double tap gestures. You can also customise the home and back buttons.

It has swipe typing plus a lot of other new features/theme customisation that openboard didn’t have.

They have different usage scenarios.

LocalSend is for the occasional sending of files/folders from A to B or B to A (One direction only).

Syncthing’s primary usage is for keeping the exact same copies of files on A and B automatically.