Son. We're simply stunned that a simple to-do app can be more fun than any game we've ever downloaded. Complete with Nintendo-esque sound effects and a sweet 70's-style icon, Clear ($1) is a list-keeping wunderkind that uses nothing but gestures — swipe right to check off an item, swipe left to delete one, pinch to close the list, pull down to create a new one, tap and hold to reorder — to make and manage all of your life's lists. You need to see it in action for yourself. Getting stuff done has never been this enjoyable.