Open source · macOS 13+

Know exactly what's draining your MacBook battery

Voltscope tracks each app's energy use over time, so you can spot power hogs, stretch battery life, and keep your Mac running longer without a charger.

Download for macOS See how it works

Measured energy dataMulti-day chartsCSV export

Voltscope History window showing battery level, stacked app energy, and the Energy breakdown and Apps columns

Voltscope menu bar battery panel showing current charge, health, top energy use, and History actions

Why Voltscope

Compared with the tools already on your Mac and other battery monitors.

Activity MonitorWattagioVoltscope

Measured energy data

History across restarts

Apps grouped clearly

Sleep and wake markers

CSV export

No extra permissions needed

Open source

Your battery, finally under your control.

See the real power hogs

See how much energy each app uses, measured with the same system data behind macOS.

Trends that survive reboots

Unlike Activity Monitor which forgets everything on restart, Voltscope keeps days and weeks of history so you can see what's really draining your battery over time.

One app, one row

Chrome and its helpers show as one entry. You get a clear view of each app's energy impact.

Understand every drain

See when your Mac slept, woke, or was plugged in on the same energy timeline. Spot patterns you might otherwise miss.

Always visible, never in the way

Live battery stats in your menu bar. Charge level, health, temperature. Click for the full picture. No window clutter.

Your data, your format

Export everything to CSV for spreadsheets or deeper analysis. Your battery data stays on your Mac.

How it works

Voltscope turns your Mac’s battery activity into a clear story you can act on.

Keep an eye on your Mac

A lightweight menu bar companion watches quietly in the background, without getting in your way.

Read the signals macOS knows

It uses macOS energy readings instead of guessing from a rough CPU percentage.

Build a history over time

Your timeline stays on your Mac and survives restarts, so one odd afternoon becomes a useful pattern.

See what changed

Compare battery level, system energy, and app CPU activity to decide what to close or investigate.

Open source · data stays on your Mac · no telemetry

Start in seconds.

Download

Grab the latest DMG. One click install, just like any Mac app. No terminal, no compiling.

Open & forget

No sign-up, no permissions, and no background daemons. Open the app and it runs quietly.

Know your battery

Menu bar glance for quick stats. Open the window for beautiful multi-day charts and per-app breakdowns.