Story highlights Koby Soto, 27, was dumped over the phone last week

His Fitbit heart-rate tracker captured the moment

Soto posted it online and was overwhelmed by the response

(CNN) Wearables have become a popular way of tracking our daily workout, eating habits and sleep cycles. But for one man -- it had an extra feature -- it tracked the precise moment his heart broke.

It was a normal Saturday for Israeli student Koby Soto . The 28-year-old juggles a few things -- studying at law school as well as work at Guesty, a Y Combinator-backed startup he co-founded with his twin brother that helps customers manage their Airbnb properties. He was due to take a break from studying to "chill out" with his boyfriend when he received an unexpected call.

Out of the blue, his boyfriend said he was calling it quits. Soto thought things were going great, they'd been seeing each other for a while and the relationship was "pretty intense" -- they met almost everyday. Unfortunately the feeling wasn't mutual.

Koby Soto

Blindsided, Soto did what most of us have done -- he tried to focus on other things and spent the rest of the day in a funk. It wasn't until he was tossing and turning in bed that night trying to sleep, his heart rate noticeably heightened in his emotional state, that he turned to his Fitbit app on a whim.

What he saw stunned him: There, in vivid color, was his breakup tracked through his heart-rate monitor.