Pokii automatically uses iCloud to keep your data in sync between your iPhone and iPad — any changes you make on one will appear on the other automatically, as long as both are signed in to the same Apple ID, iCloud Drive is turned on, and they're both on the same version.
To enable iCloud Drive click Settings / iCloud / Save to iCloud : See All / iCloud Drive : enable "Sync this iPhone"
At the moment, Pokii doesn’t have a dedicated Mac version, so it won’t stay in sync on your Mac. The version you can install from the Mac App Store may look the same, but unfortunately it doesn’t support full iCloud syncing.