voltbar
// menu-bar instrument · macOS 14+

Read your Mac's battery
like an instrument.

Health, temperature, voltage, current and real-time power flow — measured straight from the silicon and laid out in your menu bar. A native Swift app that idles at ~0% CPU.

power flowcharge → cell
download .dmg view source

apple silicon · ad-hoc signed · no telemetry

live voltbar.panel
The Voltbar panel: battery health, temperature, power flow and capacity
~0.0% idle CPU
event-driven, no polling
0KB network
zero telemetry, ever
0dependencies
pure Swift + IOKit
100% native
no Electron, no web view

On the readout

01

Battery Health

%

Capacity vs. design — can read past 100% — with live cycle count.

02

Temperature

°C

Cell temperature in °C / °F with a normal · warm · hot verdict.

03

Power & Electrical

W

Real-time watts, voltage, current draw and the exact charge state.

04

Power Flow

⌁

A curved split, drawn live — energy into the cell vs. into the machine.

05

Smart Alerts

Hz

Low, charged and plug events — a glowing Dynamic-Island bubble, each previewable.

06

Featherweight

g

Visibility-gated reads, sleep/wake aware, idle at effectively zero cost.

Wire it up

path A · download
  1. 01Grab Voltbar.dmg from the latest release and open it.
  2. 02Drag Voltbar onto the Applications shortcut.
  3. 03First launch: right-click Voltbar → Open.
# if macOS still blocks it
xattr -dr com.apple.quarantine /Applications/Voltbar.app
path B · build

Swift toolchain on Apple Silicon, macOS 14+.

$ git clone https://github.com/Hisham-Tariq/voltbar.git
$ cd voltbar
$ ./build.sh        # → build/Voltbar.app, signed
$ open build/Voltbar.app

A Voltbar.zip is attached to each release too.