CalendarAlerts+

CalendarAlerts+ breaks through the limits of the iOS Calendar app on the kind and number of alerts you can set per calendar event (a maximum of 2 alerts for 10 predefined time periods for most calendar types, even fewer choices for all-day events)

CalendarAlerts+ allows you to create and edit an unlimited* amount of alerts per event for time periods ranging from 0 to 99999 minutes, hours or days before or even AFTER* the start time of a calendar event. In addition, for calendar types that support it, you can set an event for a specific date and time rather than a relative time period.

CalendarAlerts+ syncs with the calendar events from the built in iOS Calendar app and presents the events in a traditional calendar view or a searchable list view that lists your next four years worth of calendar events.

Additional features of CalendarAlerts+ include:

Changing the default start time for all-day events
Support for displaying multiple calendars
Jump to a specific date from within calendar view
Calendar view displays in week view in landscape mode
Create new calendar events directly within CalendarAlerts+
Edit non-alert calendar event information directly within CalendarAlerts+

*Known limitations:

MS Outlook / Exchange calendars are limited to one alert per calendar event.
MS Outlook / Exchange calendars cannot have alers that start after the event start time.
Google calendars are limited to five alerts per calendar event.