for the last four years, grono has been meticulously recording tracking and creating numerical graphsthat correlate with almost every act he performance, every moment, no matter how small in his life. >> what compelled you to start this in the first place? >> i think curiosity. >> what did you do? >> started a tab in excel. and just for every day put in how many miles i ran and if i went to the gym, how much work i did at the gym. and about a month or two later i think pretty early on i started tracking sleeping as pel. >> grono's obsession with monitoring his life has, his blood levels his commute time how much he meditates, how many hours he's exposed himself to the sun. the san francisco resident is recently engaged so there's even a category called courtney. there he can survey the length of their relationship, their favorite relationships, their intimacy. >> this sounds like ocd, if it's not ocd, it's something approaching it, the different strain perhaps. >> the difference i feel from ocd is i control it, it doesn't control me. i try to understand the cadence of my life, if i'm