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Blinks44/monny

A free, open-source native macOS menu bar app that shows CPU, memory, disk, network and battery status and can cap battery charging at 80-100%.

Open-source alternative to:iStat Menus

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Last commit
3 days ago

What is it?

Monny is a native macOS menu bar utility for watching system resources and keeping the battery healthy while the Mac stays plugged in. Clicking the menu bar icon shows CPU, memory, disk, network, per-core load and battery readings at a glance, and a dashboard window adds history charts from one minute to seven days, top processes and temperature sensors.

The battery charge limit uses the built-in macOS setting, so it is changed as the ordinary user and keeps being enforced after Monny quits. It requires macOS 26.4 or later and a Mac with a battery. The Processes tab can find which process holds a given port or PID and quit just that process.

An optional AI usage panel, off by default, reads remaining limits for several AI coding tools using each tool's own sign-in on the Mac. Readings stay on the machine; the only network requests are update checks and, when that panel is enabled, limit checks with the relevant providers. The app requires an Apple silicon Mac and is distributed as a DMG outside the Mac App Store.

Key features

  • 01Menu bar popover with Overview, Battery and Processes tabs and a global shortcut.
  • 02Dashboard with CPU, memory, disk, network, battery and sensor pages and 1-minute to 7-day history.
  • 03Battery charge limit between 80% and 100% using the built-in macOS setting.
  • 04Process lookup by port or PID, with the ability to quit a single process.
  • 05Notifications for a reached charge limit, a hot Mac, low battery, high memory pressure or a CPU-hungry app.

Use cases

  • Checking which process is using a port or consuming CPU without opening Activity Monitor.
  • Limiting battery charge to around 80% on a Mac that stays plugged in most of the time.
  • Keeping an eye on temperatures and memory pressure during heavy builds or long-running jobs.

Quick start

  1. 1

    Download Monny.dmg from the latest GitHub release and drag Monny to Applications

  2. 2

    Remove the download quarantine flag so macOS lets the unnotarized app open

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

Things to know

  • Requires an Apple silicon Mac running macOS 15 or later; Intel Macs are not supported.
  • The app is not yet notarized by Apple, so macOS blocks the first launch until you allow it.
  • Battery charge limits need macOS 26.4 or later and a Mac with a battery.

In collections

macOS menu bar appsOpen-source Mac apps

Topics

#macos#system-monitor#battery#menu-bar-app#swift#swiftui#apple-silicon#activity-monitor#battery-health#charge-limit

FAQ

What is monny?
A free, open-source native macOS menu bar app that shows CPU, memory, disk, network and battery status and can cap battery charging at 80-100%. Monny is a native macOS menu bar utility for watching system resources and keeping the battery healthy while the Mac stays plugged in. Clicking the menu bar icon shows CPU, memory, disk, network, per-core load and battery readings at a glance, and a dashboard window adds history charts from one minute to seven days, top processes and temperature sensors.
Is monny free to use? What license does it have?
monny is open source under the MIT license. Check the license terms before using it in commercial products.
Is monny still maintained?
Actively maintained. The last commit to monny was on Nov 4, 2026.
What can I use monny for?
Checking which process is using a port or consuming CPU without opening Activity Monitor. Limiting battery charge to around 80% on a Mac that stays plugged in most of the time. Keeping an eye on temperatures and memory pressure during heavy builds or long-running jobs.
How do I install monny?
Download Monny.dmg from the latest GitHub release and drag Monny to Applications Remove the download quarantine flag so macOS lets the unnotarized app open: xattr -dr com.apple.quarantine /Applications/Monny.app
Where can I get monny?
The source code and installation instructions are on GitHub: https://github.com/Blinks44/monny

Summary generated by AI from the project's README. GitHub stats refresh daily.

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