Apple iPhone and iPod touch
Apple's iPhone and iPod touch supported Yahoo! push e-mail since the phone's initial release in 2007. The July 2008 release of iPhone OS software brings Microsoft's Exchange ActiveSync platform to Apple's handheld which allows the iPhone to synchronize e-mail, calendars and contacts with a Microsoft Exchange Server, Zimbra or Kerio MailServer. The software update — which adds other features commonly found in enterprise mobile devices — is available through iTunes as a free download for the iPhone and as a paid upgrade for the iPod touch.
Additionally, at Apple's 2008 Worldwide Developers Conference, MobileMe was introduced as a subscription-based service that stores email, contacts, and calendars on a secure online server — or “cloud” — and pushes this information to various clients including the iPhone, iPod touch, and Mac.