Developer Creates Tool to Track Which Coworkers Stress Him Out Using Whoop Wearable and Calendar Data

Pankaj Tanwar, a Bengaluru-based software engineer who posts on X as @the2ndfloorguy, shared a personal side project on June 10, 2026, in which he connected his Whoop wearable's heart rate data to his work calendar to identify which colleagues and meetings correlated with the biggest physiological stress spikes. Using Anthropic's Claude Fable 5 AI model, he reverse-engineered the Whoop device to extract minute-by-minute heart rate readings, then matched those readings against calendar events and their attendees. The resulting leaderboard, partially visible in shared screenshots, ranked 18 meetings and 8 attendees: a growth manager (labeled 'pm_growth') topped the list with a ridge marginal effect of 5.47 bpm above baseline, while a senior developer scored -3.20 bpm, indicating a calming influence. Tanwar told Business Insider the results were largely unsurprising and that the idea emerged from a joking conversation with colleagues about draining meetings. The post accumulated millions of views and tens of thousands of likes, with reactions ranging from calls to commercialize the tool as 'team performance analytics' to skepticism about confounding variables such as meals, physical activity, time of day, and meeting subject matter rather than specific attendees. Tanwar acknowledged the project is a fun experiment rather than a rigorous scientific study, and it fits within a broader pattern of quirky personal software tools he builds for amusement and self-insight.