WattMate is a menu bar utility that measures per-app power consumption in real watts and translates that data into actionable battery-time projections on Apple Silicon Macs. ($9.99/year or $29 one-time)
The menu bar interface lists running applications ranked by current power draw, with each entry showing the wattage consumed and an estimate of how many minutes of battery life would be recovered by quitting the app. Rather than using abstract efficiency scores, WattMate reports actual hardware power telemetry from Apple Silicon’s internal sensors. A verification step re-measures power draw 2 minutes after a user quits an app to confirm or adjust the projected savings against real-world results.
Overnight behavior tracking logs which apps caused Mac wake events during sleep, making it straightforward to identify background agents—cloud sync tools, email clients, or update daemons—that interrupt sleep and deplete battery by morning. Battery health tracking records capacity, charge cycle count, and temperature across multiple sessions, providing a long-term view of degradation. A charging monitor detects when a connected power adapter delivers insufficient wattage and alerts the user before the Mac begins net-discharging while in use. Graphics and Neural Engine activity are tracked separately from CPU power, covering all major power consumers on Apple Silicon.
A single license activates on two Macs, making it practical for users who work across a desktop and a laptop.
System requirements: macOS 14 Sonoma or later. Apple Silicon (M1 or newer) required. 10-day free trial available at wattmateapp.com.
Pricing: ($9.99/year or $29 one-time)
Limitations: Intel Mac users are excluded—the app depends on Apple Silicon power measurement APIs unavailable on older hardware. The yearly subscription pricing may be a concern for users who prefer one-time purchases, though a permanent license option exists. The app does not integrate with third-party battery management tools or export data to external dashboards.
Alternatives: iStatMenus ($14.99, one-time) offers broad system monitoring including power draw but without per-app quitting projections; AlDente (freemium) focuses on charge limit management rather than app-level power analysis; the built-in macOS Activity Monitor provides energy impact scores but not watt measurements or battery-minutes calculations.
Suitable for users on Apple Silicon MacBooks who want precise, actionable data on which apps are shortening battery life and need visibility into overnight sleep disruptions.
