How does Twilio Client pricing work?

Calls placed from a Twilio Client device or received to a Twilio Client device are billed per minute at a fraction of the rate of a traditional phone call. Please note that calls are charged based on the connections to Twilio, so if you are placing a call from your browser using Twilio client, you would have two legs of the call — one for the browser connection to Twilio, and one from Twilio out to the number you have specified.