Musi was delisted from Apple's App Store, leading to a court battle intensifying in the past month with both sides seeking sanctions.
The app, known for letting users stream music from YouTube without interruptions, maintains a loyal fan base and was removed following a YouTube complaint.
Currently, users who still have Musi installed can use the service, but new users or those who lose access are unable to download it from the App Store.
Fans of Musi express disappointment on platforms like Reddit due to the unavailability of the app for download on Apple's App Store.