Folder Player Pro v4.9.7 Build 227

It adds the following capabilities on top of free version:
* Priority updates
* Unlimited tagging, allowing you to create multiple "playlists"
* Extended cross-fading functionality
* Ability to auto-delete tracks during playback
* Option to stop on power loss
* Option to continue playback for next folder, after current folder finishes
* M3U support
Some of the other features shared between two editions:
* playing folder trees AND individual files within folders
* integration with Bluetooth headphones (and your car)
* integration with last.fm (via scrobbler)
* pauses during phone calls and navigation speech
* sequential and random play
* configurable settings
* Equalizer
* Double press headset button to skip track
* Search
Requirements: Android 5.0+
Home Page -

https://play.google.com/store/apps/details?id=com.folderplayerpro&hl=en