RUNNA FOUNDER, BEN PARKER ON BUILDING ONE OF THE WORLD'S BIGGEST FITNESS APPS IN JUST 4 YEARS

You might not have heard of Ben Parker, but you’ve almost definitely heard of Runna — the incredible running app that just sold to Strava for millions For me, this one’s probably my biggest regret but also one of my biggest lessons. A few years ago, a young entrepreneur came up to me after an…