iOS 7 Calendar
You should look at this thread on your discussions forum, people are not happy about the new iOS 7 Calendar app. Personally I don't use this app anyway, but all these people are upset about the revised interface. Frankly I think you should read these forums and take people's feedback seriously. Upsetting your customers like this is not good.
PROBLEMS: The List view is not clearly visible via an icon. You have to counter-intuitively click the search button to get to the List view. Reopening the app means you are no longer in the List View. If you scroll the list to a particular date, then rotate the phone sideways, it does not show that date in the week view. If you select an event, there is no way to then zoom out and see that entire day. You cannot add an event in the list view and have it automatically insert between two events somewhere. You cannot delete events from the List view.
You should be able to do all this stuff. Apple has seemed to become a habitual remover of features from new versions. If there's one thing people hate more than almost anything in the world, it's when a software update removes useful features from the previous version. It's especially loathsome because it's inexplicable; why would a company remove useful features from a product? It makes no sense. You did this with Final Cut Pro X and now with the new Pages for Mac and Calendar for iOS. Removing features from an update is not cool!
The actual results are that you can't do all this stuff.