StoreKit

StoreKit itself is not a standalone software with separate pricing—it is a free framework provided by Apple as part of its developer tools. Developers can use StoreKit to implement in-app purchases and subscriptions in their apps at no additional cost. However, Apple charges a commission fee on transactions made through StoreKit, typically 15% to 30%, depending on factors like subscription duration and participation in programs such as the App Store Small Business Program. These fees are deducted from the revenue generated through in-app purchases and subscriptions.