Tempo, the smart calendar app that launched earlier this year, was updated today with dial-in support for the twenty most popular conference call providers. The complete list of new services includes AccuTalk.net, AdConferencing, AnyMeeting, Calliflower, Free Audio Conferencing, Free Conference Calling,  Free Conference USA, FreeConference, FreeConferenceCall.com, Fuze, GlobalMeet, GoToMeeting, join.me, Powwownow, Rondee, TalkShoe, Totally Free Conference Calls, UberConference, Wiggio, and WebEx.

The update is live now in the App Store and is free for new and existing users.