It wouldn't be WWDC without new features for Apple Health. We knew the company had big plans for the app this year based on Tim Cook's comments in January, but now we're getting details on the improvements that will arrive with iOS 13 and watchOS 6. First, Apple is working on improved menstrual cycle tracking in its Health app -- appropriately called Cycle Tracking. And to help, the company will also offer Apple Watch tools for tracking your cycle. The Health app can help women identify their most fertile period, in addition to letting you know when your period is likely to start. It will work with the iOS version of the app as well, no Watch required.