To follow up for the various games I play in roll d20 is the goto - some people have problems with sound on roll d20 or want to stream so we use hangouts.

You can also use discord but the sound is laggy and doesn't work with better gear as well a it should

Players really need a decent headset not a $9.99 special offer.

You can play on ipads etc but you ideally need a real PC/MAC with a big screen or screens.