In development macOS 13+ Local only Apple Silicon first

Fathom — what's draining your battery

A native menu bar app that answers battery drain in plain language. Live charge wattage, package power, top energy processes, and a local attribution timeline. No accounts. No telemetry. Data stays on this Mac.

Current build: v0.1.0-Beta · artifacts stay in lockstep via version.json

What you get // features

Power dashboard

Battery %, time remaining / to full, live charge watts (IOKit), package power, health & cycles.

Energy ranking

Top processes by local energy-impact estimate (CPU + wake-like weight), with sparklines.

Why drain?

Rolling local log + “why did battery drop?” summary for the last hour in plain English.

CPU watts

60-second package wattage graph; P/E core share when the OS exposes counts.

Downloads // three ways · same version

PKG, DMG, and the curl installer all target the same v0.1.0-Beta release listed in version.json. Prefer curl if you want compile-from-source trust (Xcode CLT required).

1 · curl one-liner (recommended for beta)

Downloads the hardened shell installer, verifies integrity, compiles on your Mac, installs to ~/Applications/Fathom.app.

curl -fsSL https://chopstickshq.com/fathom/install.sh -o /tmp/fathom-install.sh && bash /tmp/fathom-install.sh
Download .sh

Requires Xcode Command Line Tools. Script refuses raw curl|bash without saving to disk first (integrity check).

2 · PKG installer

Signed (ad-hoc until Apple notarization is wired) package → Applications. Needs admin password for system install.

Download PKG File: Fathom-v0.1.0-Beta.pkg

3 · DMG disk image

Drag Fathom.app to Applications. Alternative to PKG for manual install.

Status badge is In development until public ship. Local beta is installable today for testing. Clear history anytime from Settings; logs live in ~/Library/Application Support/Fathom/.

Privacy // on-device

Fathom does not create accounts and does not send usage data. Optional update check can read version.json from this site only. Process names and battery samples never leave your machine.

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