Technology can do anything these days. From telling where a particular location is and how to reach there to keeping track of your daily bodily activities like heartbeat and sleep patterns. Fit-bits usually are a particular kind of watches that tells you about your daily activities like heart rate, pulse and sleep pattern. It also tells you how many steps you have completed in a day.
So this is a story about a woman who got to know her boyfriend was cheating on her, through a mere Fitbit. Between 2 AM and 3 AM she got a notification on her Fitbit, that her boyfriend has completed 500 calories (WOAH), hence she further looked into the matter and she found out that her boyfriend was cheating on her.