Activity Monitor shows this second. Warashi remembers. It sits quietly in your menu bar (and beside the notch), records CPU, memory, GPU, power, temperature and what every app costs, and keeps up to a year of history on your Mac. Look back at what slowed it down, see what each app costs per hour of use, get told once when something runs away, and let the Upgrade Advisor size your next Mac from your own usage. Native, private, and light: 0.18% CPU in the background. Free during the beta.