Question

I want to access notes and calendar using native iphone app. I want to know is it possible in new iphone os? Is there any public pi for that?

Answer 1

There is the Event Kit API which is documented in The Event Kit Programming Guide.

As far as I know you cannot access Notes.

The Event Kit and Event Kit UI
frameworks together allow iOS
applications to access event
information from a user’s Calendar
database. You can fetch events based
on a date range or a unique
identifier, receive notifications when
event records change, and allow users
to create and edit events for any of
their calendars. Changes made to
events in a user’s Calendar database
with Event Kit are automatically
synced with the appropriate calendar
(CalDAV, Exchange, and so on). This
document describes Event Kit concepts
and common programming tasks.