Hi Tag

I've just tried cross-fade on the Android version of the S2 app and it works perfectly.

Anthony 

Crossfade can be somewhat variable. On the players Crossfade is tied to the track times, not the track content. Audio for some tracks does not begin at time 0:00 and might end several seconds before the end of track. This can result in music starting somewhat abruptly because the Volume is no longer at zero as the music starts. At the end some tracks insert a silent section. In this case the track might already be silent or partially silent as the player executes the crossfade. These track silences can result in variable silent times between tracks or seemingly ineffective crossfades.

In my experience Crossfade is most effective on pop tracks.