$/HR NOW
Translate Mac power telemetry into a clear live operating-cost estimate.
Available now on the Mac App Store
WattWatch
See what your Mac costs to run—right now, over time, by app, and against comparable computers.
Cost by application
Learn from apps installed in /Applications and ~/Applications as real usage data builds.
Utility-aware estimates
Enter a U.S. ZIP code to find nearby utility rates, then verify your provider and tariff.
Menu bar and widget
Keep the current hourly estimate nearby, even when the main app is closed.
Computer comparisons
Compare the current Mac with similar Apple systems and comparable computers from other manufacturers.
Your usage stays local
Progressive measurements and learned app estimates remain on the Mac.