Right click on an iPad

Hi

I've published an Articulate360 eLearning and the right click trigger command works perfectly except when I use an iPad to complete the learning.  The usual equivalent on an iPad is press and hold (which works outside of my eLearning) but does nothing in Articulate.  Anyone know why it doesn't respond or have any bright ideas of how I may overcome this issue easily without re-writing those instructions somehow.  

Many thanks in advance.

Sarah