I am not signing up for an account so I don't know exactly how the API works, but if I were setting up an iPhone App to work with this, I would use the rails plugin. Rails gives you JSON communication for free (IE no extra work required) http://guides.rubyonrails.org/layouts_and_rendering.html see section 2.2.9. Then use on IOS app use something like: http://code.google.com/p/json-framework/ to interact with that.
With Constant Contact, you can build your email lists from your company website or even from your Facebook page. More than just an email tool, Constant Contact has plenty to offer apart from sending emails including managing blog content, event management, online survey tools, and coupon creation. It also offers a comprehensive set of real-time reports.
AWeber offers three email editors: a drag-and-drop WYSIWYG editor, a plain text editor, and an HTML editor for those who prefer to code their own emails. The WYSIWYG editor is pretty easy to use and allows for a fair degree of customization, though not quite as much as I would have liked. You can insert a simple “Click here” button, coupon, logo, or signature with the click of a button. Social share buttons are easy to generate once you link AWeber with your Facebook and Twitter account. Drafts are autosaved every two minutes, and you can see a list of previous versions (so that if you accidentally delete something, you can usually retrieve it).
One of the challenges I’ve had with email marketing is figuring out exactly what to offer and when. I’ve tried the pretty HTML newsletter, but it felt like overkill at times and a little dated (there are of course a few awesome ones out there, but it just never felt like me). I tried taking an ‘e-letter’ approach but felt overwhelmed with creating original content for the newsletter on top of the blog. And more recently, I’ve simply been sending out broadcasts when a new blog or podcast is published. And this is all fine.
Email marketing has the highest conversion rates of any marketing channel. In fact, sixty-six percent of online consumers made a purchase after receiving an email marketing message — which is more than social and direct mail, according to the Data & Marketing Association. And transactions from email are three times more profitable than those made on social media, reports the global management consulting firm McKinsey & Company.