You can use this service with any modern Apple or Google Android Phone or Tablet, or any modern Windows, Mac or Linux using Chrome, Safari, Firefox or Opera browsers.
You also need a good Internet Connection.
You can use any online tester, this one is good https://www.speedtest.net/
Ideally, you need a solid connection with 2Mbs up and 2Mbs down, otherwise your clinician won’t be able to see you.