TweetToCall is a simple service that allows users to initiate phone calls between their Twitter contacts with just one click, using Twilio to power the telephone calls. The service requires authentication with Twitter and verification of the user's phone number, and connects calls anonymously, with no caller ID visible on either party's end. Calls are limited to four minutes and free, making it a convenient way for users to quickly exchange numbers or have short conversations. The service was created by the author and her husband as a proof-of-concept after seeing the launch of Jajah's Twitter calling service, and is now available at http://www.tweettocall.com.