A few days ago I requested information and help from the developers, asking if was possible to transfer data from one device to another.
All because since 3.0.3 my device (iPad with IOS 18.5) is suffering from crashes. So the only solution I found was to transfer the data to an Android device.
The answer the developers gave me was that account synchronization is planned for the future. I hope we can see this feature very very soon, as it is something quite necessary.