You can contact us via email :[email protected] [about subscription] Users can subscribe to the monthly subscription service of kilonotes to unlock advanced content, including custom time planning books. The subscription will be automatically renewed. If the user needs to cancel the subscription, the renewal needs to be closed 24 hours before the end of the current cycle Users can close and cancel subscriptions and trials in their iTunes account. Privacy Policy: https://www.top-stack.com/page/Kilonotes_Privacy_Policy_En.html User agreement: https://www.top-stack.com/page/Kilonotes_Terms_of_use_En.html