Just wanted to let everyone know that we pushed updates out for both the Android and iOS versions of the game this weekend that allow for the transfer of save files between all devices! Please try this out and let us know if you encounter any issues. The file transfer buttons are located on the title screen, right next to the file boxes:

Please also use this feature to upload your file to the server to use as a backup. If you file is lost you can download it with your retrieval code.
If you lost your save file and never uploaded it, there's a chance I can try to re-construct it for you. Priority for this service goes to players that have purchased game items with real currency.
For any assistance with locating your file or building a new one, please email me at anpshawn gmail.com
Note: The latest version of both mobile apps is 1.2.02, while the latest version of the Steam app is 1.2.04