Are there items (such as additional content, offers or currency) for sale that are used in the gameplay of your product?

Yes, Your Chronicle has in-app purchases to buy rubies, the in-game currency.

Can your product be used without making any in-app purchases?

Yes, you can play Your Chronicle without making any in-app purchases. It is possible to earn rubies, the in-game currency, without in-app purchases, but you can earn rubies instantly by making in-app purchases.

Are in-app purchases refundable?

No, in-app purchases are not refundable.

What payment platform is used to facilitate these purchases? Do you use Epic Games’ platform or a 3rd-party (including your own) payment system?

Your Chronicle uses Epic Games' platform payment system.