The Fi-2 music player app is available for free from the windows mobile 8.1 & 10 store for 24 hours. Its a worldwide deal so unsure exactly when the 24 hours started so if your interested in it get it as soon as you can. This app is not available for windows 10 pc.
https://www.microsoft.com/en-au/store/p/fi-2-music-player/9w…
If you'd like more information on it check out this article on windows central.
http://www.windowscentral.com/fi-2-music-player-windows-10-m…
I use my Lumia 532 running Windows 10 as a toy because you can't turn off auto update and have to provide a 6 hour daily window during which the phone can reboot. Total pain int he butt and makes the phone completely unsuitable for on call support work because all it would take is one poorly timed update and forgetting to jump through hoops to set that Window before a shift to totally screw me. Windows 10 mobile sucks!