lit watches your Mac’s battery so you don’t have to — custom alerts, real health data, and charging habits that make the battery last longer. No account, no subscription, no catch.
macOS gives you one low-battery warning, no health data, and no idea what’s connected to your Mac or how much charge it has left. lit is the menu bar app that actually tells you what’s going on.
Add any threshold — 3%, 20%, whatever matters to you — and get a real macOS notification the moment you cross it while unplugged.
Live health percentage, cycle count, and temperature, read straight from the same data macOS itself uses.
AirPods, Beats, Magic Mouse, keyboard, trackpad — anything reporting standard HID battery, listed with color-coded levels.
Notified when you plug in, unplug, and when you hit 80% while charging — the cue to unplug for long-term battery health.
Icon + percentage, percentage only, or icon only — an iPhone-style battery glyph that color-codes itself as it drains.
Real Swift, not Electron. Idles at roughly 0% CPU. Everything is computed on-device — nothing leaves your Mac.
Being upfront: these aren’t built yet. They’re the harder, system-level pieces we’re working through in the open.
Cap charging at 50–80% to slow long-term degradation. Needs a privileged helper to write SMC charge-control keys, so it's a bigger, careful build.
See which apps are draining your battery right now, with 24h/7d/30d history. Likely needs the private IOReport framework — under investigation.
Plug in your phone or tablet and see its health, cycle count, and temperature too, no extra app required.
"You'll be under 20% by the end of your 2pm meeting" — reading your calendar so you're never caught out mid-call.
Set alerts at 10% and 5% so you know exactly how much runway you have left before you need to wrap up.
An 80% alert while charging is your cue to unplug — the single habit that does the most for long-term battery lifespan.
A 20% and 15% warning gives you time to save and wrap up before the screen goes dark mid-thought.
Early alerts at 25% mean you're never scrambling for an outlet mid-pitch.
lit is MIT-licensed and built in the open. No trial, no license key, no paywalled features — clone it, build it, or grab a signed release. Everything runs locally; nothing phones home.
Yes — MIT licensed, no trial, no license key, no paywalled features. Build it from source or grab a signed release from GitHub.
No. Battery and device readings are computed on-device and never leave your Mac. There's no account, no analytics, no cloud sync.
macOS 14 and later, on both Apple Silicon and Intel.
Custom alert thresholds instead of one fixed low-battery warning, real health/cycle/temperature data, Bluetooth accessory battery levels in one place, and lifecycle alerts for healthier charging habits.
Every line is public on GitHub — read it, build it yourself, or audit exactly what it does before you trust it with your Mac.