Dyrii provides you with two options to store data.
a) Local on the Device
b) Your iCloud Account
The Local option provides the highest privacy but it comes at the price of you having to manually backup the data without having the system to save it on the cloud and it sync the data across your devices.
To enable iCloud, navigate to Settings/Storage.
On Mac, this option can be invoked by clicking on the sync/cloud button on the toolbar. This option can also be enabled from the Preferences settings as shown in the screenshot below.