You can now sync your data across your devices using your Google Drive account. To do so, go to 'Sync' menu on the left navigation bar:
When first accessing the page, it will ask you to enter the google account you want to use. You can use existing or add a new one. The steps are default to google and quite intuitive.
Then you'll have a new screen, something like following:
Here you can either upload (push) your current device's backup to your Google Drive account. Or, download it (pull) from there, if you've previously done upload.
The push operation will create a file called 'MyEffectiveness.bcp' on your Drive. Then this file will be uploaded when pulled to / pushed from this or other devices.
This syncing, by the way, does not restore reminders, which is something we have missed, but we'll work on that soon.
The functionality has just been implemented and probably has bugs and inconsistencies. So, we'll appreciate any feedback on the feature.
Hope this makes using the app much better!