Agreed, a must have, I've tried to Gnucash Mysql, ... but the Mysql version is really bad as well.. I understand a lot of work will be needed, ... complete separation of the core QOF library so these can be fully ported to mobile (to prevent double work, when changing are done to the business logic side), ... this is being done but looks like a multi year project.. This could pave the way for a better client-server setup (ynab is a SaaS application, Gnucash will need to have it's own configurable client-server option)

I wonder that if, as work around, the current export features of the mobile version can be expanded to use the same dropbox/googledrive/cloud storage files with a big warning that the version on your desktop must be closed before saving anything via your phone.. not ideal but a first way..

I am very surprised that more people haven't voted for this so far.

This is the one downside of GNUCash for personal use at the moment (all the others have practical workarounds).

The problem to be solved also means that GNUCash would need to improve the way it searches for and identifies matching transactions when entered from the mobile.