John Hall
CNBC Make ItJohn Hall is the co-founder and president of Calendar, a time management app, and the Chief Strategist of Relevance, a growth marketing agency. He is also the author of the best-selling book "Top of Mind."
John Hall is the co-founder and president of Calendar, a time management app, and the Chief Strategist of Relevance, a growth marketing agency. He is also the author of the best-selling book "Top of Mind."