PHDo you want to play some beats without the cost of a large data allocation?,then play 
Melobeat!.It has some built-in piano songs,and the other songs will be on thine storage.Yes! You can play your own songs.
But you see,maybe not,Even though it can detect beats for you to play.It still depends oj the settings of how'd you play it,and also the beat detector ain't much reliable and accurate at all.
But,just in case if you wanna try it out!
Melobeat!.It has some built-in piano songs,and the other songs will be on thine storage.Yes! You can play your own songs.But you see,maybe not,Even though it can detect beats for you to play.It still depends oj the settings of how'd you play it,and also the beat detector ain't much reliable and accurate at all.
But,just in case if you wanna try it out!