Drain turns your MacBook's notch into a live battery gauge. Hover it to see what's using power right now, what each app has cost you since you unplugged, and where your charger's power goes. When something runs away, stop it in one click.
First 1,000 licenses at $5, then $9One-time paymentmacOS 14 or laterMacBooks with a notch
When a script or dev server drains your battery, Drain names it by its project and command, with a Stop button right there. Hover it to see its folder, what started it and when. If what started it has closed, a warning tells you nothing else will stop it.
Every app, project and part of your Mac gets its own line: the screen, speakers, keyboard light, USB devices, charging heat and macOS itself. A short test measures the screen, speakers and keyboard light on your own Mac. Drain learns what charging heat costs each time you plug in or unplug, and keeps adjusting its figures as you use your Mac. And it keeps a tally of what each one has cost you since you unplugged, so you know where the last 31% went.
Solid: what each one has used so far. Faded: what it's using right now.
A paused video can keep the speakers on for hours, and your Mac won't sleep while it does. Drain tells you which browser, and suggests which of your open sites is likely doing it.
When an app you can quit keeps using a lot of power for a minute, its icon appears beside the notch with a warning. Several stack up. Never for parts of macOS you can't stop.
See the charger's name, how much it delivers, how much your Mac uses and what goes into the battery. If a cable or a shared charger holds it back, or smart charging is holding the battery, Drain says so.
When your Mac gets hot and starts slowing down, or the battery heats up, a warning appears under the chart, with a tip like "try a hard surface".
Turn Low Power Mode on or off from the panel. A yellow leaf beside the notch shows when it's on.
When a video or game goes fullscreen, even in players like VLC, the line around the notch dims. Or hides completely, if you prefer.
Buy a license and use it. There's nothing to sign in to. The license is checked with our payment provider when you activate it, then about once a month.
Drain doesn't report what you run, when, or for how long.
Browser tabs are checked only while a browser keeps the speakers on. Only the names of media sites are kept, in memory, and never saved.
For the first 1,000 licenses. Then $9.
10 %/h reads as roughly ten hours of battery. Watts are one click away if you prefer them.
From your Mac: per-process energy counters, the chip's energy counters and the power controller's sensors. The screen, speakers and keyboard light are measured once with a short test that tells you exactly what it will do before it starts. Charging heat is learned each time you plug in or unplug, and the figures keep adjusting as you use your Mac.
Only while a browser keeps the speakers on, Drain looks at your open tabs for sites that usually cause it, like YouTube or X. Everything else is dropped right away and nothing is saved.