When comparing Spotify vs Mellow Player, the Slant community recommends Mellow Player for most people. In the question“What are the best audio players for UNIX-like systems?” Mellow Player is ranked 31st while Spotify is ranked 32nd. The most important reason people chose Mellow Player is:
It is written in Qt so it requires less resources than a web browser or an electron application.
Specs
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Pros
Pro Huge collection of music and fast access to newly released songs
Spotify has over 20 million songs and arguably the largest collection out of its competitors and usually has the fastest access to new music.
The Spotify desktop client allows local music files to be imported with the option of syncing with a mobile device which largely mitigates the issue of missing artists.
Pro Related artists
Helps to find new authors based on your previous picks
Pro Client's functionality can be extended via third-party apps
Spotify desktop client allows for third-party apps. They extend the functionality of Spotify and many of them offer new ways of discovering music. Noteworthy apps include Moodagent, Last.fm, Swarm.fm, ShareMyPlaylists, The Hype Machine, We Are Hunted, Shuffler.fm.
Pro Curated playlists
Public playlists on Spotify created by other people are great for finding new music.
Pro Has a free version
A free, ad-supported account allows streaming from an extensive library of music.
Pro Weekly Discover playlist uses a great algorithm
A playlist generated by Spotify based on your listening habits and released every Monday. The algorithm used by this playlist is great and stands out from its competitors.
Pro Native
It is written in Qt so it requires less resources than a web browser or an electron application.
Pro AppImage
It is available as AppImage so you can easily try it.
Cons
Con Free account have lots of ads
If you hate commercials, you would buy Premium or go on using something else.
Con Discovery is terrible
The discovery algorithm is poor and does not learn fast enough. Not obvious how to train it.
Con Poor audio quality
There's a high range of bitrates and most of vary from average to bad.
Con QML
It written in Qt-QML which ignores all Human Interface Guidelines and make the app look like a web page.
Con Not native
It's using qt5-webengine which is not much different from electron / a webbrowser.