Sunrise-Sunset Alarm Clock

Sunrise-Sunset Alarm Clock provides the ability to set the alarm based on when the sun will rise (or set). The Sunrise-Sunset Alarm Clock gives you a simple user interface that enables the user to be able to wake up at dawn, or the crack of dawn, or before dawn without having to change the alarm clock settings over the course of days, weeks, or even months.

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* Sunrise-Sunset Alarm retrieves the current sunrise and sunset times based on the specific day of the year.

* Find solar midnight and solar noon, and all three periods of time (dawn and dusk) periods: astronomical time, nautical time, and civil time. Keep tabs on the next solstice and equinox.

* Reminders and Alarms: Use Sunrise-Sunset Alarm Clock as a natural alarm clock that you can set to any event (like sunset, golden hour or solar noon), and the alarm or reminder time will adjust gradually as the days change with the seasons.

* Automatic Location: Sunrise-Sunset Alarm Clock not only calculates the amount of daylight and sunrise and sunset times, but does so for any location in the world (both Northern and Southern hemispheres) by using your device's GPS... no network connection required.

* Optional location-aware alarms. Sunrise-Sunset Alarm Clock knows when you change with your location; and as you travel it will adjust any alarms you set relative to sunrise and sunset times.

* Sunrise-Sunset Alarm Clock contains several options -> live weather changes, local notification support, vibrate mode, and alarm sounds (50 different alarm sounds).

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Note: On iOS 5 you have to enable notifications for this app for it to work in the background. there's a central settings screen for notifications where you have to explicitly opt in each app you care about...