WattMeter
Battery power in your menu bar
Only for Mac
Free
Mac
Your Mac's charge power, system draw, adapter wattage, battery health and temperature — live in the menu bar. No ads, no account, no tracking, fully offline.
WattMeter is a tiny, clean menu-bar app that shows your Mac's power status in real time.
It's more than a battery percentage — it shows how power actually flows:
• Input power coming from the adapter (W)
• Power charging into the battery (W)
• Power your system is drawing (W)
• Discharge and time remaining when on battery
■ Features
• Live menu-bar readout — the right numbers for charging / on-battery / AC
• Time to full and time to empty
• Adapter wattage and description, measured input power
• Battery temperature, cycle count, and maximum capacity (health)
• Automatic Korean and English
• Universal — Apple Silicon and Intel
■ Light and honest
• Runs only in the menu bar, no Dock icon
• No ads, no account, no internet required
• Collects and transmits absolutely no data
Power balance: adapter input = system draw + power into the battery.
WattMeter reads macOS battery data (IOKit) directly and computes the rest.
Note: measured input power (adapter→system) is provided on Apple Silicon Macs. On Intel Macs, charge/discharge and battery info are shown, but system draw may be unavailable.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, song ho seong, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- song ho seong
- Size
- 164.3 KB
- Category
- Utilities
- Compatibility
Requires macOS 12.0 or later.
- Mac
Requires macOS 12.0 or later.
- Mac
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Copyright
- © 2026 song ho seong