Being built by Google, it’s no surprise that Android integrates with Google’s suite of online services seamlessly. Gmail, Google Contacts and Google Calendar are synced over-the-air to Android handsets with little setup. On the other end, Google’s web apps can be used from any computer, regardless of OS, giving users their data anytime, anywhere.
Apple offers MobileMe as a similar service, but with an emphasis on syncing with rich desktop applications, not web-based services. MobileMe works well, but at $100/year, is pricey for what it does. Like Google Sync, MobileMe pushes customers’ data over the air.