What Do Pinterest,Venmo,Gogobot and PersonalCapital Have in Common? Mobile Growth

Pretty awesome meetups on mobile growth are beginning to spread around the bay. I was at one hosted by Branch @ Pinterest last night. It was incredible. Anyone else know of good insights on growing your app? Or good resources to reference? https://soundcloud.com/branchmetrics/building-companies-smart-people-great-ideas-arent-enough