What Android app can play .M4A or .ACC music files? NRG Player is genuine but it seems to be a trial. Other players such as “Music Player” or “Rocket Music Player” claim they do until you hit their pay wall and some apps just don’t work.
I use TTPOD music player for all music playback. If you can get past the Chinese language in some portions of the app, it is a very capable player with many options and abilities. https://play.google.com/store/apps/details?id=com.sds.android.ttpod&hl=en
There are plenty of other, simple options, such as has been mentioned.
There is another way that just change your audio format to mp3 then play on android. Just like this http://www.firecoresoft.com/m4a-converter-mac.html
Use the FREE Equalizer Music Player from https://play.google.com/store/apps/details?id=cn.voilet.musicplaypro
Another one that claims to support your media type is Player dreams: https://play.google.com/store/apps/details?id=com.team48dreams.player
try mortplayer it has a free version
Plays all media types supported by core Android (MP3, Ogg Vorbis, M4A, 3GP, MIDI, Wave) and some device specific (WMA, FLAC), but only on devices which support them