Nap App Means You'll Never Miss Your Subway Stop Again

In the last scene of Girls' first season, Lena Dunham's character Hannah falls asleep on a late-night, Coney Island-bound subway train. It's light out by the time she wakes up. She's missed her stop, and her purse is gone.

If only she'd had MetroNap App. The cool new app, only available for Android, uses the phone's built-in accelerometer and the stop-and-go motion of the train to sense how far you've traveled towards your chosen destination. Because knowledge of specific train routes and stations is so central to its function, the app only works in New York.