good music machine vs HiddenTrack

good music machine is made for people who love a well organized library and wish the column browser was available on iOS. - Play music in your local or cloud library
- Play mp3 or m4a files in a local or iCloud drive folder
- A folder of files uses the files’ metadata to build your library.
- iCloud files can be downloaded to your device for offline play. - Supports CarPlay - Uses logical columns (genre, album, artist) for finding your music - You can search any of the lists - You can turn off the genre column - Optionally you can filter using an additional composer column for classical music (or any genre you prefer) - You can browse your albums by album art or just text If you have questions, comments, feedback or found a bug, feel free to contact me! Note: good music machine is not entirely free. 
The first 25 artists for both the music library or a folder of files are free.
If you want to use a bigger library you can take a subscription for $0,99 per year with a 1 month trial for new users. 
Using a subscription model supports future development. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

HiddenTrack is a small, slow app for the people who still care what's on the B-side. Curated crates of handpicked vinyl — themed, rotating, made with intention. Swipe through cards like you're flipping through a bin. Preview tracks instantly. Save the ones that speak to you. Share the ones you can't keep to yourself. THE EXPERIENCE • Swipe right to keep, left to pass, up to listen • 30-second previews built in — no Spotify or Apple Music needed • Buy links to Bandcamp, Discogs, eBay, and Amazon — support artists directly when you can • Save records to your personal collection • Build your own crates and publish them to the community WHY HIDDENTRACK • No algorithm — every crate is hand-picked by real people • No account needed — your collection is yours • No ads, no noise, no upsells • A mobile-first experience designed for taste, not scale WHO IT'S FOR • Vinyl collectors looking for their next pickup • Crate diggers who miss flipping through bins • Music heads who want to share what they're loving • Anyone tired of "recommended for you" feeds WHAT YOU CAN DO • Browse today's editorial crates — fresh themes, refreshed regularly • Build a personal crate from records you save • Make it public — your friends see a beautiful web page with previews and buy links • Discover crates from other heads in the community feed • Follow the discovery — what's playing, what's new, what's making people stop A hidden track is the song nobody told you about. The reward for staying through the credits. The good stuff for the people who pay attention. This is for them.