In developmentmacOS 13+Local onlyApple 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.
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.