Twilight App: This app filters the blue spectrum on your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. Recent research suggests that exposure to blue light before sleep may distort your natural (circadian) rhythm and cause inability to fall asleep. I’ve been sleeping great since I installed this app and I would suggest anyone try out the free version. Circadian Rhythm, Fall Asleep, Beds Time, Twilight App, Fashion Zone, Free Android, Complete Fashion, Android App, Sports Android
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Lifehacker Pack for Android 2013: Our List of the Best Android Apps - this is a great list. At least 5 of my daily apps are on this list...