WattMate
Menu-bar app that shows which Mac apps and coding agents are draining your battery, in watts.
Measures actual watts from the battery's current and voltage and the chip's energy counters — not Activity Monitor's unitless "Energy Impact" score — and converts that into minutes of battery life you'd get back by quitting an app. Catches a coding agent left running as its own row. It checks its own promise too: two minutes after you quit something, it re-measures and reports what actually changed, saying so plainly when the change came from something else. Free for 10 days, then $9.99/year or $19 once at launch price.
What holds up
- +Measures real watts from the battery and chip counters, not Activity Monitor's unitless score
- +Re-measures 2 minutes after you quit an app and reports what actually changed
- +$19 one-time launch-price option avoids a recurring subscription
Mind the limits
- −Free tier skips minutes-back figures, battery health and historical totals
- −Full app is only free for 10 days — there's no permanent free tier
Picked here? Add the badge
Put it on your site. It links back to this page. Free for every listed product.
<a href="https://stillworks.dev/products/p/wattmate/"><img src="https://stillworks.dev/badge/wattmate.svg" alt="Picked by StillWorks" width="230" height="54"></a>