Capax · Battery health for Mac and iPhone

A look inside

Clean, native, at a glance.

Summary

One hero metric: battery health, full-charge against design capacity, in a custom gauge. Below it, your charge level and the details that matter, cycle count, temperature, power, voltage, and the adapter. Honest labels, no clutter.

History

Capax logs samples locally and charts the trend. Switch between health, capacity, cycles, and temperature across 24 hours, 7 days, 30 days, or all time, with latest, min, and max at a glance. Everything stays on your device.

What it does

Everything about your batteries.
Nothing you don't need.

Your Mac

Battery health, full-charge vs design capacity, cycle count, temperature, power, voltage, and the power adapter, all in one clean view.

Your iPhone & iPad

Plug in over USB to read the real battery health, cycle count, and capacity Apple hides. The tools are bundled in, so there's zero setup.

History & trends

Capax quietly logs samples and charts health, capacity, cycles, and temperature over time, all stored on your device.

Live in the menu bar

Charge % and watts at a glance, with a popover summary. Open the full window only when you want the details.

Honest by design

Real numbers. Kept private.

Capax reads straight from the hardware and shows true values. It never fakes or "repairs" a health figure. It is a read-only monitor: it changes nothing, sends nothing, and works fully offline.

Read-only · no charge tricks Offline · no account Open source · AGPL-3.0

Install

Up and running in a minute

Download the latest Capax.dmg from Releases, open it, and drag Capax to Applications.

First launch. Because it is an open-source unsigned build, right-click the app and choose Open, or run the command below.

For an iPhone or iPad, connect it over USB, unlock it, and tap Trust. Its battery card appears automatically.

xattr -dr com.apple.quarantine /Applications/Capax.app