CloudBeats is a free app that can stream music from a variety of cloud storage providers. It’s available for iOS and Android.
I’ve been testing CloudBeats for about a year using pCloud — and it has performed quite reliably. The app has good buffering technology that creates a smooth playback.
You can create playlists with tracks from multiple cloud providers. Supported music formats include MP3, FLAC (pro version only), WAV, M4A. There is no support for ALAC.
Supported services include: Dropbox, pCloud, ownCloud, NextCloud, Google Drive, Box, OneDrive, OneDrive for Business, Amazon Cloud Drive, Mediafire, My Cloud Home devices by Western Digital and HiDrive.
The $5 pro version allows to you take music offline. You also get FLAC file support, Chromecast support and the ability to access multiple clouds.