Spotify Music::Appstore for Android

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Spotify - Wikipedia

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Play Spotify Music on Android Phone and Devices

How to Download Spotify Songs to Local Storage on Android

I'm developing a music player app for iOS that supports playing from Spotify and which is more focused on playing with your own music library instead of music discovery and social features.

Apple Testing SongShift Feature to Transfer Spotify Playlists

Spotify: Music and Podcasts - Apps on Google Play

Spotify overhauls Android, iOS interface for better engagement