From the Command Line to the App Stores: How I Built Turn Off PC

Turn Off PC is a cross-platform power-management app with mobile and desktop clients.

A Go server component and a custom TCP protocol handle communication between devices.

Platform-specific power commands support three operating systems for shutdown, restart, sleep, and wake.

The desktop app manages the server and monitors connections in real time.

The product includes a monetization layer, documentation in 11 languages, distribution across five app stores, has 3,000+ active users, and version 2.0 was a complete architecture rewrite.