Though the idea behind syncing may be simple, putting it into practice requires coming up with reliable solutions to some knotty problems. Here are the biggies:
* How do you get the information from one device to another?
* How can you guarantee that the most recently changed pieces of information replace the outdated ones?
* How do you resolve conflicts when the same pieces of information are changed in different ways on different devices?
* How do you translate between the internal storage formats that different devices may use for the information you want to sync?
All tough questions, but ones you don’t have to answer because the developers who create syncing applications already have—in fact, Apple itself has answered these questions several times in several ways over the last few years.
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