What type of apps published through the App Store can only be discovered with a direct link?

Unlisted apps are those that can only be discovered through a direct link, meaning they do not appear in public searches on the App Store. This feature is particularly useful for developers who want to limit access to their apps while still providing them to a specific audience.

For instance, an organization might develop an app for internal use or for a select group of customers and share it via a direct link without making it visible to the general public. This approach helps maintain privacy and control over the distribution of the app, allowing those who have the link to access it without requiring it to be broadly available.

The other types of apps mentioned have different purposes or methods of distribution that involve broader visibility or more restrictive access conditions.