Esfresco supports iCloud Syncing for all your invoices, clients, and settings. It will also sync custom templates if you use them.
To turn iCloud syncing on, simply toggle the switch in the Settings tab. If you have already setup from iCloud during setup, you don't have to take any other steps.
It's worth noting that iCloud Sync can sometimes be flaky, especially on mobile connections like 3G and 4G. It's always recommended that you verify that everything has synced. If syncing has stopped working for you, we recommend you export your data (as a backup), then delete and reinstall the app. As long as iCloud sync worked correctly in the past, your data should be intact.