See unrounded health, live power use, charger performance, and when your battery is likely to need replacing. For your Mac, iPhone, iPad, and Bluetooth accessories.
Free and open source. Pro is a £9.99 one-time purchase. See installation options.
WhatBattery turns the data macOS already holds into three useful answers: how healthy the battery really is, where the power is going, and how quickly the battery is wearing.
System Settings rounds battery health to a whole number, so anything from 99.5% up shows as 100%. WhatBattery works from the raw capacity figures and shows one decimal place, alongside cycle count and Apple's own service condition.
You see wear starting months before a rounded number admits it.
See how true health works →
See the real watts flowing into or out of the battery, the charger your Mac negotiated, voltage, and temperature. Pro also ranks your own apps by live watts and keeps the day's top power users.
Activity Monitor gives you an energy score. WhatBattery gives you watts and tells you honestly what cannot be attributed to an app.
Explore live power and app usage →
Pro builds a long-term health record, measures the wear rate, and projects the window in which your Mac is likely to reach 80% health. If the battery starts ageing faster than its own trend, WhatBattery flags the change.
Not just “91% today”, but a replacement window you can budget around, and silence when the history is too thin to support one.
See battery history and runway →
Start with the Mac. Add the iPhone or iPad you connect to it, then keep an eye on the accessories around it.
True health, cycles, live watts, temperature, charger details, service condition, and the current power state from the menu bar.
Explore all features →Read health, cycle count, temperature, voltage, and live power from your Mac over USB or Wi-Fi. Nothing to install on the device.
See connected-device health →See live levels for supported keyboards, mice, trackpads, and AirPods. Pro forecasts when they will die and warns you first, with a menu bar readout.
See accessory forecasts →Small Mac utilities that explain what the hardware is actually doing.WhatBattery joins WhatCable and WhatPort in the Bitmoor product family.
The free app is a useful battery monitor on its own. Pro adds history, forecasts, multi-device analysis, and evidence you can export.
No. It is strictly read-only. It reads battery and power data through Apple's interfaces and never writes to the battery, enforces a charge limit, or changes charging behaviour.
The App Sandbox blocks the low-level IOKit and SMC reads WhatBattery needs. It ships directly as a Developer ID-signed and Apple-notarised app, so it opens without a Gatekeeper warning.
Trust the Mac once over a cable, then read the device over USB or Wi-Fi using the same connection Finder uses. No app is installed on the device. Read the setup guide.
£9.99 once, for up to two Macs. There is no subscription and purchases have a 14-day money-back guarantee.
Free, open source, signed, and notarised for Apple Silicon Macs running macOS 14 or later.