For the live calls every week we use a software called Zoom.
You can find out more about there software by going to there webiste: http://www.zoom.us
You can use this software on almost all devices:
Live calls on Windows
Live calls on Mac
Live Calls on Iphone and Ipad
Live Calls on Android
To download your appropriate software version please visit this link:
Additional extensions and information can be found on the above link.