Yes to both questions
To install your paid version, use on your LG3 the google account used to purchase AquaMail.
For settings, save/restore on Dropbox. Be sure to select "settings" while saving/restoring. You may need to create a Dropbox account if you don't have one. Worth doing, very efficient to save/restore and share on many devices.
« Last Edit: Today at 01:29:28 am by Paris Geek »
In addition to Paris Geek's suggestion:
Question 2:
(1) How to Backup AquaMail's settings
> Menu > Backup and restore > Backup > enable option "Back up app settings"
(2) How to Restore AquaMail's settings
> Menu > Backup and Restore > Restore > enable option "Restore app settings"
...you should be connected to Dropbox with a valid account on your device during this process, to be able to see the "Dropbox".
Mikeone