I first set up itunes on my macbook pro with a nano. Then I set up an ipod touch which of course has apps now. I now have an ipad 2 and have different apps loaded and organized on the ipad. I want to sync my macbook, ipod t, and ipad calendars. I'm tired of entering the same calendar events on all 3 devices. How do I do this without loosing all of the apps I downloaded onto either my ipodt or ipad2? I want different apps on each device. What will happen when I sync my ipad on itunes?