Yes, Coffee Stack provides a free version with basic features, and users can also opt for a free trial of the premium version to explore additional functionalities before committing to a subscription.

Coffee Stack can be used offline for most features, but an internet connection is required for syncing data across devices and accessing online resources or updates.

You can contact Coffee Stack support via the in-app support feature or by emailing their customer service team directly. Feedback can also be submitted through the app to help improve future updates.

You can manage or cancel your Coffee Stack subscription through your account settings within the app or through the app store where you initially purchased the subscription.