Blueridge Believer
Puritan Board Professor
If you haven't downloaded this app yet you really should. A truly monumental work. Has the 1650 Psalter, audio tunes, and John Brown of Haddinton commentary on each of the 150 Psalms.
https://play.google.com/store/apps/details?id=com.charisdevelopment.thesixteenfifty
https://play.google.com/store/apps/details?id=com.charisdevelopment.thesixteenfifty