Battery · macOS 13+ · free

The battery menu,
done properly.

macOS warns you at 10% and 5%, in a banner Focus can swallow. Volt alerts at any percentage you like, as a floating capsule nothing can hide, and shows everything your Mac already knows: real health, live watts, per-app energy, and the battery of every device you've paired.

Download for Mac · 1.0.2 · universal · 2.4 MB
Native Swift, local-only. Signed & notarized, so it opens like any Mac app. Auto-updates via Sparkle.
A threshold crossed: a floating capsule, a sound, and an optional screen-edge glow. Focus can't suppress it.

What it does.
Everything your Mac already knows.

Alerts at any percentage

Add as many thresholds as you want, 30, 20, 15, 3, on the way down and the way up. Each gets a floating pill, a sound, and an optional screen-edge glow you cannot miss. Focus can't suppress it.

Real battery health

Maximum capacity against design capacity, cycle count against the rated maximum, live cell temperature, and a plain-English verdict on whether the pack needs service.

Every device in one list

AirPods, left, right and case separately, Magic Mouse, Magic Keyboard, Trackpad and paired headphones, ranked lowest-first with their own low-battery alerts. Nothing dies mid-call.

Per-app energy, kept

Which app is eating your battery, right now and averaged over 24 hours, 7 days or 30 days, with sparklines. History stays local, so you can catch the tab that drains you every afternoon.

Live watts and time

Real draw in watts, what the charger actually delivers, voltage, current, and time-to-empty or time-to-full, any of it right in the menu bar, next to an iPhone-style battery with the percentage inside.

Local, tiny, free

Native Swift and AppKit. No Electron, no account, no network calls, no telemetry. Every reading comes from IOKit on your own machine and stays there.

Also in the box.
The quieter half.

Lifecycle
Alerts on plug in, unplug, reaching 100%, crossing 80% while charging, running hot, and the pack needing service.
History
Battery level over 6 h / 24 h / 3 d / 7 d, with charging stretches shaded.
Records
Lifetime extremes: hottest, coldest, highest and lowest voltage the pack has ever seen.
Menu bar
Green when charging, orange when low, red when critical; optionally shows time remaining, watts, or temperature.
Housekeeping
Open at login, Sparkle auto-update, and opt-in auto-dismissal of macOS's own battery banner.

Free.

No tiers, no keys, no payment links. Auto-updates in place.

Download Volt · 1.0.2 · universal
macOS 13 or later · universal DMG, 2.4 MB · native Swift · local-only · signed & notarized