MailChimp is used by more than 5 million people to design and manage email marketing campaigns and newsletters. It is free for up to 2,000 subscribers, and if you have a larger email base than that there are two pricing brackets. Visit www.mailchimp.com for all the details.
MailChimp is a seriously powerful application and could be useful whether you are in business, running a community group or social club, or need to communicate with any other group of people via nicely designed, professional looking emails. The service also allows you to keep an eye on how successful your communications are, tracking open rates and so on.
This is primarily a web-based application, but there are apps for both Android and iPhone to help you make the most of MailChimp on the move. You can't actually design email campaigns from your handset yet – I hope that will come in time. But you can view those you have set up, schedule them, see reports and manage email lists. If you are a MailChimp user, then downloading the app is a logical thing to do.
OS: Android, iOS