Tempo, one of our favorite iPhone calendar apps (alongside Fantastical) just received an update that should make it significantly more attractive to business users. Why? Well, Tempo now includes support for automatical dial-in for the top 20 most popular conference call services. So now, when you set a calendar appointment for a conference call, Tempo will find that email, grab the dial-in details and code, and if it is one of the 20 services, you can use Tempo to call and enter the conference code for you, all with one tap. The 20 services include: 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.

You can get Tempo Smart Calendar for free in the App Store.