I recently got a new ipod after a few years of my last one being broken. I had a binaural beats app on my ipod for lucidity, which I can now once again use, and have had moderate success with (not trying for a ld, but experienced a strange state of mind). I have two questions.

1) Does anyone have any app recommendations for binaural beats, or isochronic tones? I am particularly interested in isochronic tones since they are more flexible as far as headphone usage. While I would prefer free, my own search of the app store shows that that is unlikely. So if there is one that is particularly good, please tell me and I will see if I have the money for it.

2) The earbuds are a problem for me. Binaural beats require them, but I do not like sleeping on my back. When I sleep as normal, the pillow jams the bud up my ear and is quite uncomfortable. Are there any types of headphones that would lessen this, or any tips on positions to take or things to do with the earbuds? Should I just suck it up and try sleeping on my back?

I appreciate any answers.