WatchAudio is a multimedia application developed by Atlum Limited, designed specifically for iPhone users seeking a dedicated audio solution on their Apple Watch. With WatchAudio, users can conveniently add and play audio files directly from their Apple Watch, offering offline playback at any time. The app supports a variety of audio file formats including MP3, M4A, FLAC, and more, allowing users to organize their music by albums, artists, and playlists. Additionally, users can mark favorites, enjoy Now Playing app support, and benefit from features like play all, shuffle options, and resume playback position for long audio tracks.

For enhanced functionality, users have the option to upgrade to Premium, unlocking features such as Podcast & Audiobook menus with chapter support, batch importing of zip files, and no audio limits. WatchAudio also provides privacy policy and terms of use links for users' reference.