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.
Publr.com is a free blogging service with a few innovative features. It allows posts of various types, including your typical text, but also including maps, videos, chat transcripts, and links. Its site has a pretty good typical web interface for such things, and there are both first-party and third-party applications to use to post. Those third-party applications use the Publr API.
The most popular API, in terms of mashup count, is far and away the Google Maps API, which accounts for 41% of all mashups. But when it comes to the most popular pair of APIs, Flickr and YouTube mashups are the most common. Not to be outdone, Google Maps joins Flickr in a near second place.