DigiCal has 3 different paid products available:
This is a one time purchase and unlocks a bunch of customization options inside the app and widgets settings: https://digibites.zendesk.com/hc/en-us/articles/200299333
2) Premium weather
This is a yearly subscription that automatically renews until cancelled and upgrades your weather forecasts: https://digibites.zendesk.com/hc/en-us/articles/200068181
3) Calendar Store
This is also a yearly subscription that automatically renews. It unlocks our calendar store containing over 560,000 calendars that you can subscribe to with the click of a button: https://digibites.zendesk.com/hc/en-us/articles/205862551
*The latter 2 are subscriptions because we also need to subscribe to this data ourselves and therefore can't include it in DigiCal+.