Press kit

Updated 23 August 2026 · everything on this page may be quoted and reproduced without asking. Who measures this.

Where the product is right now

The trial is downloadable and complete. Buying is not open yet — the payment provider is still verifying the seller — so anyone you send here can install and use the app for ten days but cannot yet pay for it. If that matters for your timing, write and ask; the answer will be a date rather than "soon".

One line

What's draining your Mac right now — and what quitting buys.

Slightly longer: power by app in real watts, the minutes you'd get back by quitting one, and a measured receipt two minutes later.

The facts

Name	WattMate
Platform	macOS 14 or later, Apple silicon only
Price	$9.99 a year, or $29 once ($19 for the first 100 keys)
Trial	10 days, no card, starting the first time you unplug
Licence	Two Macs per key
Distribution	Direct download from this site. A Mac App Store edition exists without per-app energy.
Privacy	All measurement local. No account, no cloud, no per-app data leaves the machine.
Developer	One person, measuring on three Apple silicon Macs

What it does that others do not

Per-app energy is no longer unusual: Juicy, WhatBattery and Mac 4 Breakfast all list it. Checked against their own pages on 23 August 2026, what we have not found elsewhere is the receipt — naming what quitting an app is worth in minutes before you do it, then re-measuring the Mac afterwards and printing what actually changed, including "the effect couldn't be isolated".

If you are writing a comparison, our reviews of the other apps quote their own pages with dates, and two of our five head-to-heads end by recommending the other product.

What it cannot do

Worth stating in a review, because it will come up:

No charge limiting. macOS 26.4 caps charging natively on Apple silicon, and a second switch beside Apple's own would be a feature for a feature list.
No Intel support. The per-process energy counter compiles on Intel and silently returns zero.
No per-app energy in the App Store edition, permanently: the sandbox forbids asking the system about other processes.
Graphics energy has a total but no owner in macOS, so the split between apps is inferred rather than measured. The app says so on screen.

Screenshots

Free to use in coverage, no permission needed, no attribution required. Each is 384 × 681 and comes from a real machine rather than a mock-up.

File	What it shows
shot-apps.webp	The menu bar panel: power now, the heaviest apps in watts, and the minutes quitting one frees
shot-receipt.webp	The receipt: promised 24 minutes, got 28 after quitting Safari
shot-night.webp	A night: 6% lost in sleep, 68 wake-ups, Spotlight named first
shot-charging.webp	Plugged in but falling: the adapter is 12 W short
shot-history.webp	A month of discharges with what each one went to

Icon: 512 × 512 PNG.

Contact

Write to support@wattmateapp.com. Review copies, a licence for testing, or a specific measurement you want run on our machines — all fine to ask for, and the last one is genuinely interesting to us.

If a number on this site looks wrong, say so and it gets checked. Two claims were corrected today because someone checked them against a competitor's own page.