A modern system monitor app in Python (codes included)

Introduction

In this project, I built a system monitor desktop app with Python. I use PyQt5 for the interface, pyqtgraph for live charts, and psutil for system metrics.

I started this as a simple CPU/RAM monitor, and now I have upgraded it into a cleaner, modular app with a better UI and better developer workflow.

Repo: SystemMonitorApp

What I added in the latest update

• I reorganized the project into a proper src/system_monitor package.
• I split UI, services, and models for easier maintenance.
• I made the dashboard responsive and resizable.
• I added minimize/maximize support and optional start-maximized mode.
• I added a new chart mode to show both CPU and RAM in the same figure with different colors.
• I added extra real-time stats: disk usage, process count, network throughput, and uptime.
• I added optional CSV telemetry export.
• I added Makefile commands for install, run, status, and close.
• I added tests for core service logic.

Install and run (macOS/Linux)

python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
python systemMonitor.py

Run with Makefile (macOS/Linux)

make install
make run
make status
make close

I can also pass runtime arguments from Make:

make run APP_ARGS="--start-maximized"

Run on Windows (PowerShell)

python -m venv .venv
.venv\Scripts\Activate.ps1
pip install -r requirements.txt
python systemMonitor.py

Useful runtime options

python systemMonitor.py --start-maximized
python systemMonitor.py --no-splash
python systemMonitor.py --interval-ms 1000 --history-seconds 30
python systemMonitor.py --export-csv data/metrics.csv

Current project structure

.
├── src/system_monitor/
│   ├── app.py
│   ├── constants.py
│   ├── models.py
│   ├── services/
│   └── ui/
├── tests/
├── docs/
├── main.ui
├── splash_screen.ui
└── systemMonitor.py

Download codes

I provide the Windows installer from: Downloads Page

Source code is available at: GitHub - SystemMonitorApp