OpenTok is a free set of APIs from TokBox that enables websites to weave live, group video communication into their online experience. TokBox is a web application that allows users to make multi-party video chat calls over the Internet without a download. With OpenTok users can: control size, layout and movement of video streams; stream to multiple pages and sites at once; create both "viewer" and "participant" roles; scale to large gatherings. The API uses RESTful protocol with responses formatted in XML.
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This tutorial is based on code created at the [App Developer Conference Conference and Hackathon](http://appdevconf.engagedigital.com) in Santa Clara, CA as a result of about 4 hours of hack time. Thus, it is extremely rough, though it should serve as a good starting point for working with both [AppMobi](http://www.appmobi.com) and the [SendGrid API](http://docs.sendgrid.com/documentation/api). This code has been tested on a MacBook Air running Lion. The iOS portion was tested using an iPhone 4s using the AppMobi labs iPhone app.
This program will allow you to send an email within your iPhone or Android app, view rudimentary account statistics and receive a SMS message when a link is clicked in your email.