WattMate is a macOS menu bar utility that estimates which open app is consuming battery power. It reports the power use in watts and estimates the battery time saved by quitting an app, then measures again after the app is closed to show the observed change. It is built for Apple silicon Macs running macOS 14 or later.
Use cases Find which Mac app is draining battery, Investigate overnight battery loss, Check whether closing an app helped
77 active referring domains
Full review

