What is the MediaMonkey application, how does it work?

According to the introduction of Ventis Media, Inc., MediaMonkey is a Music & Audio app on the Android platform. There is currently a 1.3.6.0887 version released on Nov 26, 2019, you can see the details below.

MediaMonkey helps you navigate, manage and sync large music collections. Key features:
❖ Sync (wirelessly *) with MediaMonkey for Windows. Keeps playlists, tracks and videos including file info, ratings, lyrics, play history, etc. in sync.
❖ Manage Music, Classical music, Audiobooks, Podcasts, Video.
❖ Navigate by Artist, Album, Composer, Genre, Playlist, etc.) with support for multiple attributes (e.g. Genre=Rock;Alternative)
❖ Navigate by Folder **
❖ Play any content supported by your device (using system codecs), with replay gain (volume leveling) and an equalizer
❖ Sleep timer
▶ NEW: Cast to Google chrome cast or UPnP/DLNA devices ** †
▶ NEW: Android Auto support
❖ Bookmark large files (e.g. Audiobooks, videos)
❖ Access and download media from UPnP/DLNA servers **
❖ Player widgets for home screen or lock screen
❖ Edit properties of single/multiple files
❖ Manage single/multiple files (e.g. play, queue, playlist management, delete, use as ringtone, share)
❖ Playlist management with hierarchy
❖ Now Playing views: Album Art / Tracklist
❖ Compatible with with third-party scrobblers (Simple Last.fm, Scrobble Droid, Last.fm)
❖ Full-library search
❖ etc...

* USB Sync is unrestricted. Wi-Fi sync is a time-limited trial.
** Time limited trial.
† Only supported on Android 4+


Available Upgrades:
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❱ Wi-Fi Sync addon: Unlocks unlimited wireless synchronization. Available as an in-app purchase.
❱ UPnP/DLNA addon: Unlocks unlimited UPnP/DLNA usage. Available as an in-app purchase.
❱ Advanced Media Management addon: Unlocks home screen customization, folder browser. Available as an in-app purchase.
❱ MediaMonkey Pro: Unlocks all trial functionality, and provides all of the addon features described above in one bundle. Available in the App Store.


Explanation re. Permissions:
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In-app purchases - to purchase addons
Device & app history (retrieve running apps) - to show/hide the notification icon
Identity (find accounts on the device) - to allow purchases of addons
Photos/Media/Files (Read, modify, delete, or test access to the contents of your USB storage) - to sync/download content via UPnP
Wi-Fi and Other network connection information (view Wi-Fi connections, full network access, connect and disconnect from Wi-Fi, allow Wi-Fi Multicast reception, view network connections) - for Wi-Fi sync / UPnP
Other
- prevent device from sleeping - for video playback
- modify system settings - to change Wi-Fi settings
- change your audio settings - for audio/video playback
- pair with Bluetooth devices - for bluetooth playback
- install shortcuts - to add playlist shortcuts
- read phone status and identity - to hide the Lock Screen Player (only on system OS versions < 4.2) during a phone call
- disable your screen lock - to allow for a Lock Screen Player on system OS versions < 4.2