I was wondering why all the recordings of the performances are on iTunes but don't seem to be on Google Play. Does every XF viewer have an iPhone instead of Android? All of Syco's other stuff (1D, Ella, etc) is on Google Play so I wonder why they don't put the XF songs on there too?

I think X Factor has an exclusive agreement with iTunes regarding the live performances. In exchange, iTunes doesn't provide sales numbers to the OCC. Or something like that.