Hi
Automatic iCloud syncing is a bit too simplistic for Roastmaster's databases, but Roastmaster provides a few easy ways to manually share data among devices.
Open the drum door on the home screen, and tap "Utilities > Export Current Database"
Tap the action button (square with arrow) and choose your nearby AirDrop device
On the destination device, tap "Replace" when the import screen pops up
If both devices don't support AirDrop, you'll need an intermediary means of connection. In addition to AirDrop, Roastmaster supports DropBox, email and iTunes File Sharing.
Danny