Gmail Meter is a tool developed by Google Apps Script Top Contributor Romain Vialard, which sends you a monthly email containing different types of statistics about your inbox that could help you analyze your email habits and become more efficient.
Gmail Meter provides stats about the number of important and starred messages, the number of people who sent you emails, the time of day you usually send and receive messages and weekly traffic patterns that give you a sense of your overall email activity. It also tells you how you are managing your inbox by showing which emails are in labels, archived or in trash.
Gmail Meter shows you how long it takes you to reply, how long it takes others to reply to you, how long your emails are, whether you participate in long conversations resulting in long threads, and it helps you identify who you communicate with most frequently. Watch the video below to see how to set up Gmail Meter: