The best alternatives to Musio are Poolsuite, VOX for iOS, and Vinyls. If these 3 options don't work for you, we've listed a few more alternatives below.
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Postman Recorder by DevTools— Export Postman APIs from browser
Vinyls is a beautiful music player built with iOS design guidelines in mind. There are no complicated user accounts or settings to configure. You can start listening to your music right away. You can scrub to seek, watch the tone arm follow the playback time.
Doppler is a beautifully designed music player designed and built for people who buy music. Import music and playlists to listen offline, and edit song and album artwork and info without syncing. Now with support for Siri, Spotlight Search, and CarPlay.