Renewing as premium member

Hello, I have already purchased an agenda member. After 12 months, if agenda has new features, how can I get it? Do I need to pay again? Or will old members get discounts for in-app purchases again?

Yes, if the 12 month period of free new premium features has lapsed and we introduce new features that you’d like to have, you would need to purchase those again. Your purchase would then again include 12 months of new premium features. See Get All Features and this blogpost from Drew for more details.