Unlisted App Store apps

Unlisted apps on the App Store can't be discovered through browsing the App Store, but are still available by opening a direct link. The purpose of this feature is to allow companies to distribute their app to a limited audience of customers or partners, without needing to register all relevant devices in the company's Apple Developer account, use enterprise certificates, or use unsupported means such as sideloading.

It should be noted that unlisted apps are intended for business-to-business or education purposes, and is not intended for more general use cases, such as distributing beta app builds without using TestFlight.

Apps become unlisted by submitting a request to Apple to enable the feature.

List of unlisted Apple apps
The following is an incomplete list of apps Apple has developed and published to the App Store as unlisted.

iOS Apps

 * Accessory Developer Assistant
 * Apple Health Studies
 * Car Keys Tests
 * Find My Certification Assistant
 * GymKit Certification Assistant
 * Health & Fitness Recorder
 * Health Support
 * MagSafe Certification Assistant
 * Platoon for Artists

tvOS Apps

 * Apple Partner Media Review
 * Extras Previewer